BESOSA, District Judge.
*222On September 12, 2018, the Court continued the trial pending the disposition of four motions in limine. (Docket No. 95.) Plaintiffs José Díaz-Casillas ("José Díaz"), Olga Díaz-Casillas ("Olga Díaz") and Rosa Luz Ramos ("Ramos") (collectively, "plaintiffs") move to exclude the deposition transcripts of Katia Dávila-Díaz ("Dávila") and Kenneth Miller ("Miller"). (Docket Nos. 66 and 67.) The plaintiffs also move to preclude defendants Doctors' Center Hospital San Juan, Inc. ("Doctors' Center Hospital") and José Pesquera-García ("Pesquera") (collectively, "defendants") from calling expert witnesses at trial. (Docket No. 65.) The defendants move to exclude expert testimony by José Díaz and Boris Rojas ("Rojas"), testimony by Dávila and Iris González ("González"), and a "Day in the Life" video of Zoraida Díaz-Casillas ("Zoraida Díaz"). (Docket No. 53.)
For the reasons set forth below, the plaintiffs' motion to preclude the defendants from calling expert witnesses at trial is MOOT. (Docket No. 65.) The plaintiffs' motions to preclude Miller and Dávila's deposition transcripts are DENIED. (Docket No. 66 and 67.) The defendants' motion in limine is GRANTED IN PART and DENIED IN PART. (Docket No. 53.)
I. Background1
This medical malpractice litigation stems from a purported misdiagnosis. (Docket No. 1.) On February 12, 2016, Zoraida Díaz became ill with jaundice and developed a skin condition. Id. at p. 4. González drove Zoraida Díaz to the Centro de Diagnóstico y Tratamiento in Carolina, Puerto Rico. Id. at p. 4. A complete blood count exam revealed that Zoraida Díaz possessed a "critical[ly] low value of platelets at 13," in addition to low levels of red bloods cells, hemoglobin, and hematocrits. Id. at p. 5. Zoraida Díaz sent text messages with photos of her skin condition to her brother José Díaz, who is a neurologist in Houston, Texas. Id. José Díaz urged Zoraida Díaz to be "evaluated by a hematologist emergently." Id.
The Centro de Diagnóstico y Tratamiento transferred Zoraida Díaz to the Doctors' Center Hospital. Id. Her transfer sheet indicated that she had "petequiae in her mouth and lips and petequiae and hematomas on her extremities." Id. González accompanied Zoraida Díaz in an ambulance to Doctors' Center Hospital. Id. at p. 6.
Doctors' Center Hospital triaged Zoraida Díaz an hour after her arrival, classifying her as "urgent" rather than "emergency." Id. The triage nurse noted that Zoraida Díaz's skin condition was "normal." Id. The emergency room physician, Toru Hashida-Kurihara ("Hashida"), evaluated Zoraida Díaz. Id. She informed Hashida that José Díaz "believed her petechiae, hematomas and laboratory values presented an emergency medical condition." Id. at p. 7. Hashida consulted with Pesquera, a hematologist. Id. Pesquera prescribed one unit of platelets and a corticosteroid. Id. According to the plaintiffs, Pesquera did so without obtaining results from diagnostic tests, including "a peripheral *223blood smear, an LDH test, and an ADAMTS 13 test." Id. at p. 8. The plaintiffs maintain that these tests are necessary to distinguish between "TTP and ITP," both of which are blood-related diseases. Id. Pesquera diagnosed Zoraida Díaz with ITP. Id.
The plaintiffs allege that blood smears are "ordered on a regular basis when a person is being treated or monitored for a blood cell-related disease." Id. Zoraida Díaz received a blood smear four days after arriving at Doctors' Center Hospital. Id. at p. 9. The blood smear "yielded a value of 5805 when the hospital's reported accepted range is between [ ] 313-618." Id. Subsequently, Zoraida Díaz's sight diminished, she became incoherent and lost control of her extremities. Id. Pesquera ordered a Head CT scan, which "indicated that the images were deteriorated by the patient's motion, aggressiveness and disorientation." Id. at p. 11.
Pesquera subsequently altered his diagnosis. Id. at p. 11. He concluded that Zoraida Díaz suffered from TTP. Id. The plaintiffs aver that the "administration of platelets to a patient with TTP is contraindicated because it causes thrombi or blood clots, which can be life threatening." Id. at p. 8. The standard TTP treatment includes a "plasmapheresis or, in the alternative, a plasma transfusion." Id. at p. 11. The Doctors' Center Hospital did not administer a plasmapheresis or a plasma transfusion. Id. If left untreated, TTP "can be fatal or cause lasting damage, such as brain damage or stroke." Id. Zoraida Díaz transferred to another hospital in Puerto Rico, where she received a plasmapheresis. Id. at p. 12.
The plaintiffs allege that Zoraida Díaz sustained "permanent ischemic damage," after which point her family transported her to Texas for additional medical treatment. Id. José Díaz visited Zoraida Díaz in Texas daily, at times as her attending physician. Id. at p. 16. She remains in a "permanent vegetative state, completely incapacitated and unable to do anything for herself, even speak." Id. at pp. 12-13. At the time of her alleged misdiagnosis, Zoraida Díaz was 60 years old and "had no physical limitations." Id. at p. 14.
On February 7, 2017, José Díaz, Olga Díaz and Ramos commenced this civil action. (Docket No. 1.)2 The plaintiffs are Zoraida Díaz's siblings. Id. at p. 2.3 The complaint sets forth a medical malpractice cause of action pursuant to the Puerto Rico General Torts Statute, Articles 1802 and 1803 of the Civil Code ("Articles 1802 and 1803"). Id. at pp. 16-31; see Laws of P.R. Ann. tit. 31 §§ 5141, 5142.4
*224The complaint names five defendants: Doctors' Center Hospital, Pesquera, Hashida, Guardian Insurance Company, Inc. ("Guardian Insurance"), and Sindicato de Aseguradores para la Suscripción Conjunta de Seguro de Responsibilidad Profesoinal Médico-Hospitalaria ("SIMED"). Id. The Court granted the plaintiffs' motions to dismiss the complaint without prejudice as to Guardian Insurance and SIMED. (Docket Nos. 15 and 30.) Hashida failed to answer the complaint, despite several attempts to serve process on him personally and by publication. See Docket Nos. 18, 20, 26-28. On June 5, 2017, the Clerk entered default against Hashida. (Docket Nos. 33 and 34.) Accordingly, Doctors' Center Hospital and Pesquera are the only remaining defendants in this litigation. The parties filed four motions in limine. (Docket Nos. 53, 65, 66 and 67.) The Court continued trial to adjudicate these motions. (Docket Nos. 82 and 95.)
II. The Plaintiffs' Motions in Limine
The plaintiffs filed three motions in limine. (Docket Nos. 65, 66 and 67.) José Díaz, Olga Díaz and Ramos seek to preclude the Doctors' Center Hospital and Pesquera from presenting expert testimony at trial, and from using the transcripts from Dávila and Miller's depositions. Id. For the reasons sets forth below, the plaintiffs' motions in limine are either MOOT or DENIED.
A. Motion to Preclude Expert Testimony
The plaintiffs move to preclude the defendants from calling expert witnesses at trial. (Docket No. 65.) José Díaz, Olga Díaz and Ramos argue that "[n]either defendant announced any ... experts and provided no reports in a timely fashion and must, thus, be precluded from using any expert witnesses at trial in this case." Id. at p. 3. In their opposition to the plaintiffs' motion in limine , the Doctors' Center Hospital and Pesquera clarify that "there is no designation by either defendant that they would be using an expert in this case." (Docket No. 76 at p. 2.) Accordingly, the plaintiffs' motion to preclude the defendants from calling expert witnesses at trial is MOOT.
B. Motion to Preclude Kenneth Miller's Deposition Transcript
José Díaz, Olga Díaz and Ramos designated Kenneth Miller as an expert witness. (Docket No. 58 at p. 34.) Miller is a hematologist and will "testify regarding the breaches in [the] standard of medical care by Co-Defendants, as described in his expert report and explained in his deposition." Id. The defendants deposed Miller on May 16, 2018. (Docket No. 66 at p. 1.)5 The plaintiffs invoke Federal Rule of Civil Procedure 30 (" Rule 30"), claiming that the Doctors' Center Hospital and Pesquera failed to timely Miller's deposition transcript timely. (Docket No. 66 at p. 2.) Rule 30 provides that:
On request by the deponent or a party before the deposition is completed, the deponent must be allowed 30 days after being notified by the deponent officer that the transcript or recording is available in which : (A) to review the transcript or recording; and (B) if there are changes in form or substance, to *225sign a statement listing the changes and the reasons for making them.
Fed. R. Civ. P. 30(e)(1) (emphasis added).6 The Court may impose sanctions for failure to comply with Rule 30. See Perkasie Indus., Corp. v. Advance Transformer, No. 90-7359, 1992 WL 166042 *4, 1992 U.S. Dist. LEXIS 22431 *13 (E.D. Pa. June 11, 1992) ("Although there is no express language in Fed. R. Civ. P. 30(e) authorizing the imposition of sanctions for violations of the rules (compare Fed. R. Civ. P. 37(b) ), I am satisfied that the court has the inherent power to do so.").
José Díaz, Olga Díaz and Ramos misinterpret Rule 30. They refer to date of Miller's deposition, not the date in which the court reporter provided notice "that the transcript or recording [was] available." Fed. R. Civ. P. 30(e)(1) ; see EBC, Inc. v. Clark Bldg. Sys., 618 F.3d 253, 266 (3d Cir. 2010) ("We emphasize that Rule 30(e)'s thirty-day clock beings to run when the party is notified by the court reporter that the transcript is available for review, not when the party or deponent physically receives the transcript from the court reporter.") (citing cases).7 Without reference to the date that the transcripts were available, preclusion of the transcripts would be improper.
The Court notes that Rule 30 allots litigants "30 days" to review and "attach any changes" to the transcript. Fed. R. Civ. P. 30(e)(2). The Doctors' Center Hospital and Pesquera assert that the plaintiffs received the transcript on August 22, 2018, more than thirty days ago. (Docket No. 77 at p. 3.) It bears emphasis that in seeking to preclude the Doctors' Center Hospital and Pesquera from using Miller's deposition transcript, the defendants do not identify any errors in form or substance. (Docket No. 66.)
Accordingly, the Court DENIES plaintiffs' motion to preclude the Doctors' Center Hospital and Pesquera from using Miller's deposition transcript. In the interest of fairness, however, José Díaz, Olga Díaz and Ramos are ORDERED to submit a proposed errata sheet identifying any proposed change to Miller's deposition transcript no later than October 30, 2018.
C. Motion to Preclude Katia Dávila-Díaz's Deposition Transcript
José Díaz, Olga Díaz and Ramos move to preclude the Doctors' Center Hospital and Pesquera from using Dávila's deposition transcript pursuant to Rule 30. (Docket No. 67.) The defendants deposed Dávila on November 14, 2017. Id. at p. 1. The parties stipulated that "Ms. Katia Dávila would have thirty (30) days to examine his [sic ] deposition, make any corrections to it, after which term it would be deemed correct and signature waived." Id. José Díaz, Olga Díaz and Ramos fail to specify *226when the court reporter provided notice that the transcript was available, or whether the plaintiffs received the transcript. The absence of this information prevents the Court from considering the merits of the plaintiffs' Rule 30 motion. Tellingly, José Díaz, Olga Díaz and Ramos fail to specify any errors in Davila's deposition transcript. Accordingly, the Court DENIES the plaintiffs' motion to preclude the defendants from using Dávila's deposition transcript. Again, the Court ORDERS the plaintiffs to submit a proposed errata sheet identifying any error contained in Dávila's transcript no later than October 26, 2018.
III. The Defendants' Motion in Limine
The Doctors' Center Hospital and Pesquera move to exclude the following evidence from trial: (1) expert testimony by José Díaz, (2) expert testimony by Rojas, (3) testimony by Dávila, (3) testimony by González, and (4) a "Day in the Life" video. (Docket No. 53.)8 The defendants' motion in limine is GRANTED IN PART with respect to expert testimony by José Díaz, and DENIED IN PART with respect to expert testimony by Rojas, testimony from Dávila, testimony from González, and the "Day in the Life" video.
A. Testimony by José Díaz
The Doctors' Center Hospital and Pesquera move to preclude José Díaz from testifying as an expert witness pursuant to Federal Rule of Civil Procedure 26 (" Rule 26"). (Docket No. 53 at pp. 2-4.) Because the plaintiffs failed to designate José Díaz as an expert witness in violation of Rule 26, the defendants argue that preclusion is proper pursuant to Federal Rule of Civil Procedure 37 (" Rule 37"). Id. The Court agrees.
José Díaz's designation as a fact witness, an expert witness, or a hybrid of the two will determine whether the plaintiffs complied with Rule 26. See Fed. R. Evid. 701, advisory committee note (a witness may "provide both lay and expert testimony in a single case"); Ting Ji v. Bose Corp., 538 F.Supp.2d 354, 359 (D. Mass. 2008) (holding that "the roles of fact witness and expert witness are not necessarily mutually exclusive").9
Rule 26 governs the disclosure of witnesses. Fed. R. Civ. P. 26. The purpose of Rule 26 is to prevent "trial by ambush," because opposing counsel cannot adequately *227cross-examine without advance preparation. Macaulay v. Anas, 321 F.3d 45, 50, 52 (1st Cir. 2003) (affirming the preclusion of evidence because "[t]he record shows beyond the hope of contradiction that she had ample time to conduct discovery and to submit her expert reports within the period allotted by the district court"). Parties must disclose any potential fact witness "likely to have discoverable information," within 14 days after the Rule 26(f) conference. Fed. R. Civ. P. 26(a)(1)(C).
Expert witnesses are subject to additional disclosure requirements. Fed. R. Civ. P. 26(a)(2). Unless otherwise ordered by the Court, parties must identify expert witnesses "at least 90 days before the date set for trial or for the case to be ready for trial." Id.; compare Downey v. Bob's Disc. Furniture Holdings, 633 F.3d 1, 5 (1st Cir. 2011) ("At its most basic level, [ Rule 26 ] obligates a party who wishes to offer expert testimony to disclose 'the identify of any witness it may use at trial to present evidence under Federal Rules of Evidence 702, 703, or 705.") (citation omitted), with Goldman v. Philips & Son Drilling, Inc., No. 13-125, 2014 WL 2573314 *7, 2014 U.S. Dist. LEXIS 77970 *7 (D.W. Va. June 9, 2014) ("Unlike expert witnesses or hybrid witnesses, however, when a person is merely a fact, or lay witness, Rule 26 of the Federal Rules of Civil Procedure only requires the party to disclose the name, address and telephone number of each witness.").
Rule 26 also requires each party to supplement or correct its disclosures "in a timely manner if the party learns that in some material respect the disclosure or response is incomplete or incorrect." Fed. R. Civ. P. 26(3)(1)(A). In the event of an untimely disclosure, the movant "is not allowed to use that information or witness to supply evidence on a motion, at a hearing, or at a trial, unless the failure was substantially justified or is harmless." Fed. R. Civ. P. 37(c)(1).
2. Lay and Expert Testimony
To distinguish lay from expert testimony, courts analyze "the essence of the proffered testimony." Gómez, 344 F.3d at 113. "The line between expert testimony under [ Federal Rule of Evidence 702 ] and lay opinion under [ Federal Rule of Evidence 701 ] is not easy to draw." United States v. Ayala-Pizarro, 407 F.3d 25, 28 (1st Cir. 2005) (citation omitted) (holding that a police officer qualified as a lay witness and expert witness, because he possessed 'particularized knowledge ... by virtue of his position"); Castro-Medina v. P & G Commer. Co., 565 F.Supp.2d 343, 361 (D.P.R. 2008) (Pérez-Giménez, J.) (holding that the distinction between a lay and an expert witness "lies in the nature of the witness's involvement in the case and the nature of the testimony the parties intend for the witness to proffer"). Accordingly, the content of José Díaz's proposed testimony - not his status as a plaintiff or as a neurologist - is dispositive.
3. Discussion
The Court initially set trial for September 10, 2018. (Docket No. 22.) On June 9, 2017, the parties filed a joint case management memorandum. (Docket No. 35.) In the memorandum, the plaintiffs identified José Díaz as a "factual witness," not an expert witness. Id. at pp. 25-26.10 The plaintiffs expressed their intention to elicit testimony from José Díaz regarding:
*228His personal knowledge of the development of his sister's condition and the events that transpired while she was receiving treatment in Texas. Will also testify about his sister's current physical state, his own emotional pain and suffering , and the emotional pain and suffering he witnessed in his niece and nephew, now main caretakers of his disabled sister.
Id. at p. 25 (emphasis added). The Court ordered the parties to disclose and exchange the names and CV's of experts by July 7, 2017. (Docket No. 36.) The defendants deposed José Díaz on January 26, 2018. (Docket No. 68, Ex. 1)
Seven months later and seventeen days before trial was set to commence, the parties submitted a joint proposed pretrial order on August 20, 2018. (Docket No. 58.) In this order, the plaintiffs listed José Díaz as a fact witness and an expert witness. Id. at pp. 32 and 35. The plaintiffs disclosed José Díaz as an expert witness regarding:
Zoraida Díaz Casillas' past as well as her current physical and neurological state. Will also testify as to the endeavors he took and the medical care he provided Zoraida while she was in Texas and in P.R. after the incident subject of this case.
Id. at p. 35.11
a. José Díaz is a Percipient Fact Witness
No party disputes that José Díaz is a lay witness. He may testify regarding his personal knowledge of the events that transpired before and after Zoraida Díaz's alleged misdiagnosis in accordance with the Federal Rules of Evidence. The plaintiffs assert, however, that evidence concerning "the medical care [José Díaz] provided Zoraida while she was in Texas and in P.R." constitutes expert testimony. (Docket No. 58 at p. 35.) The Court disagrees.
José Díaz's experience as his sister's treating physician qualifies him to testify as a percipient fact witness, not as an expert witness. "[A] percipient witness who happens to be an expert" is not necessarily an expert witness within the meaning of Rule 26. Gómez, 344 F.3d at 113 (citing Fed. R. Evid. 702) (holding that although "Pinot obviously had specialized knowledge by virtue of his position," the defendants "need not identify [him] as an expert so long as [he] played a personal role in the unfolding of the events at issue and the anticipated questioning seeks only to elicit [his] knowledge of those events"); see Downey, 633 F.3d at 6 ("[W]here, as here, the expert is part of the ongoing sequence of events and arrives at his causation opinion during treatment, his opinion testimony is not that of a retained or specially employed expert."). Testimony that is "based on personal knowledge acquired before any litigation had begun" is not expert testimony. Id. (noting that "courts have followed the advisory committee's lead and ruled that a treating physician, testifying as to his consultation with *229or treatment of the patient, is not an expert witness for purposes of Rule 26").
The circumstances in González v. Executive Airlines are analogous to this case. 236 F.R.D. 73 (D.P.R. 2006) (Pieras, J.). In González, the plaintiff disclosed that she intended to call her treating psychiatrist as a lay witness. Id. The defendants objected, however, arguing that the psychiatrist qualified as an expert witness. Id. The court rejected this proposition, holding that "a treating physician is an actor in the actual narrative of the case." Id. at 76 ; see e.g., Torres-Rivera v. Centro Médico Del Turabo Inc., 215 F.Supp.3d 202, 205 (D.P.R. 2016) (Gelpí, J.) ("Dr. Ramdev will provide testimony arising from his role as an actor in the events giving rise to litigation, and is therefore appropriately viewed as a fact witness not subject to Rule 26's requirements for expert witnesses.") (citation and internal quotation marks omitted); Hadley v. Pfizer, Inc., No. 08-1440, 2009 WL 1597952 *4, 2009 U.S. Dist. LEXIS 47363 *11-12 (E.D. Pa. June 4, 2009) ("The Court agrees that a treating physician may testify as a fact witness, pursuant to Rule 701, so long as the treating physician's testimony is 'not based on scientific, technical, or other specialized knowledge within the scope of Rule 702.") (citation omitted). Because the testimony provided by the plaintiff's psychiatrist concerned only "the facts known to him during the course of the care and treatment of the patient," the disclosure requirements pursuant to Rule 26 did not apply. Id. at 78.
Like the physiatrist in González, José Díaz served as Zoraida Díaz's treating physician, attending to his sister's care in Houston. (Docket No. 68 at p. 11 and 20.) The plaintiffs misconstrue evidence concerning "the endeavors that [José Díaz] undertook and the medical care he provided Zoraida while she was in Texas and in P.R." as expert testimony. (Docket No. 68 at p. 11.) This testimony is factual in nature. José Díaz served as his sister's treating physician before this litigation commenced. He is "an actor with regard to the occurrences from which the tapestry of the lawsuit was woven." Gómez, 344 F.3d at 113. Indeed, the plaintiffs concur that José Díaz acted as a "treating physician." Id. Accordingly, José Díaz may testify regarding the treatment he provided Zoraida Díaz as a percipient fact witness.
b. José Díaz as an Expert Witness
The plaintiffs seek to elicit expert testimony from José Díaz regarding "Zoraida Díaz Casillas' past as well as her current physical and neurological state." (Docket No. 58 at p. 35.) According to the plaintiffs:
[A]s an expert in Neurology [...] his testimony would further help to understand the permanent state of her damages as a result of defendants' malpractice and further help them understand why him, as a physician with specialized knowledge of her current condition, has suffered immensely in knowing the state of alertness, pain, helplessness and suffering her [sic ] sister is experiencing as a result of having been left in a 'locked-in' state following defendants' negligent acts.
(Docket No. 68 at p. 13.)
Testimony concerning Zoraida Díaz's physical and neurological state may require "scientific, technical, or other specialized knowledge" pursuant to Federal Rule of Evidence 702. (Docket No. 58 at p. 35.) By designating José Díaz as an expert witness, plaintiffs trigger the disclosure requirements set forth in Rule 26(a)(2). The Court ordered the parties to "disclose and exchange the names and CVs of experts by [July 7, 2017]." (Docket No. 36.) The plaintiffs concede that they violated this deadline, affirming that it was not until August 2, 2018 that the "Plaintiffs listed [José Díaz] as both a fact witness *230and an expert witness who was also one of Zoraida Díaz Casillas' treating physicians." (Docket No. 68 at p. 10) (emphasis added).
The exclusion of José Díaz as an expert witness is an appropriate and warranted sanction. Rule 37 requires exclusion unless the party facing sanctions establishes that the failure to comply was justified or harmless. Wilson v. Bradlees of New England, Inc., 250 F.3d 10, 20-21 (1st Cir. 2001). Exclusion is a compelling impetus to follow the Federal Rules of Civil Procedure and the schedule set by the Court. See Thibeault v. Square D Co., 960 F.2d 239, 245 (1st Cir. 1992). Introducing "new expert testimony on the eve of trial" can prejudice the opposing party, and will not be admitted without good cause. Id. at 247. " Rules 26(a) and 37(c)(1) seek to prevent the unfair tactical advantage that can be gained by failing to unveil an expert in a timely fashion." Poulis-Minott v. Smith, 388 F.3d 354, 358 (1st Cir. 2004) (citing Thibeault, 960 F.2d at 244 ).
The Court may forgo sanctions for untimely disclosures upon a finding of substantial justification or harmlessness. See, e.g., id. The Court must balance fairness to the parties with the need to manage dockets, considering the totality of the circumstances, such as: the history of the litigation, the need for the challenged evidence, any justifications, prior notice of the expert and the possibility of designation, whether the testimony will be meaningfully different from or cover the same areas as that of other experts, and the ability of the opposing counsel to depose or cross-examine the proposed expert. Macaulay, 321 F.3d at 51 ; see Ferrara & DiMercurio v. St. Paul Mercury Ins. Co., 240 F.3d 1, 10-11 (1st Cir. 2001). A late disclosure is harmless if it "occurs long before trial and is likely subject to correction" without materially prejudicing the opposing party. Samos Imex Corp. v. Nextel Communs., Inc., 194 F.3d 301, 305 (1st Cir. 1999) ; see Ferrara & DiMercurio, 240 F.3d at 10.
This litigation commenced nearly two years ago on February 2, 2017. (Docket No. 2.) The plaintiffs knew of José Díaz's existence and the expert testimony he could potentially offer because José Díaz is a plaintiff. José Díaz sat for his deposition on January 26, 2018, a year after the plaintiffs filed the complaint. (Docket No. 68, Ex. 1). At the time of his deposition, the plaintiffs identified José Díaz only as a fact witness, and it is with this understanding that the defendants deposed him. See Docket No. 35 at p. 25.
In support of their contention that the Court should allow José Diaz to testify as an expert, the plaintiffs argue that the Doctors' Center Hospital and Pesquera "had ample opportunity to explore all aspects of Zoraida Díaz Casillas' physical condition and his opinion as an expert in the Neurology field." (Docket No. 68 at p. 3.) The plaintiffs are mistaken. The Doctors' Center Hospital and Pesquera had no reason to explore José Diaz's opinions as a neurologist when they deposed him because the plaintiffs had not designated him as a neurological expert prior to that date. The First Circuit Court of Appeals has recognized that Rule 26"require[s] formal disclosure for a reason; without it, parties like the defendants in this case may be hindered in their ability to prepare effectively for trial." Esposito v. Home Depot, U.S.A., 590 F.3d 72, 78 (1st Cir. 2009) ; see Musser v. Gentiva Health Servs., 356 F.3d 751, 756-759 (7th Cir. 2004) (affirming the district court's decision "that the [fact] witnesses identified by the [plaintiffs] should not be permitted to testify as expert witnesses" because "disclosing a person as a [fact] witness and disclosing a person as an expert witness are two distinct acts," and the defendant "was denied the opportunity *231to question the witnesses in their expert capacity").
The plaintiffs named José Díaz as an expert witness one month before the trial was set to commence, further underscoring the prejudice resulting from the plaintiffs' untimely disclosure. Ironically, José Díaz, Olga Díaz and Ramos seek to preclude Doctors' Center Hospital and Pesquera from calling expert witnesses, because the defendants "did not disclose and exchange names and CV's of experts" by the July 7, 2017 deadline. (Docket No. 58 at p. 35.) With great temerity, the plaintiffs assert that the "[the Doctors' Center Hospital and Pesquera] cannot willfully disregard the Court approved deadlines and be allowed to bring in expert witnesses many months after the passage of these deadlines." Id. at p. 36. Neither can José Díaz, Olga Díaz and Ramos. "A litigant who ignores a case-management deadline does so at his peril." Rosario-Díaz v. González, 140 F.3d 312, 315 (1st Cir. 1998) (affirming sua sponte dismissal of summary judgment motion "[g]iven the baldness of the appellants' transgressions, the potential prejudice to the plaintiffs and to the orderly administration of the court's docket caused by the late filings, and the need to deter such conduct").
c. Expert Testimony Regarding José Díaz's Emotional Damages
José Díaz may testify as to his emotional damages without qualifying as an expert witness. See Ricks v. Abbott Labs., 198 F.R.D. 647, 649 (D. Md. 2001) ("A trier of fact, however, does not need help understanding the ordinary grief, anxiety, anger and frustration that any person feels when something bad occurs."). Expert testimony offered to establish a plaintiff's emotional distress is admissible, but not required. Koster v. TWA, 181 F.3d 24, 35 (1st Cir. 1999) ("Although testimony from a mental health expert is not required to sustain an award for emotional distress, the absence of such evidence is useful in comparing the injury to the award of damages."); see e.g., Méndez-Matos v. Municipality of Guaynabo, 557 F.3d 36, 47 (1st Cir. 2009) ("A plaintiff does not need to present expert testimony to recover damages for emotional distress caused by the violation of his civil rights.") (citation omitted). José Díaz need not qualify as an expert in neurology to convey the extent of his emotional pain.
The Court will allow José Díaz to testify as a lay witness, but not as an expert.12 As discussed below, the plaintiffs may nonetheless elicit the testimony of Boris Rojas, the neurologist whom they properly designated as an expert. The defendants' motion to preclude José Díaz from testifying as an expert witness is GRANTED.
B. Testimony by Boris Rojas
The Doctors' Center Hospital and Pesquera move to preclude Rojas from testifying as an expert witness. (Docket No. 53 at p. 4-7.) According to the plaintiffs, Rojas "will testify that the TTP ... caused the permanent Center Nervous System damage, leaving [Zoraida Díaz] totally and permanently *232incapacitated, but aware in a locked in condition." (Docket No. 58 at p. 35.) The defendants emphasize that Zoraida Díaz is not a party to this litigation. Because José Díaz, Olga Díaz and Ramos seek damages for their own pain and suffering, the Doctors' Center Hospital and Pesquera contend that "discussion of [Zoraida Díaz's] state of health in this case significantly impacts the likelihood that the jury could be confused, misled, and entertains damages claims that are not probative for the claims presented of pain and suffering before this Court." (Docket No. 53 at pp. 5-6.) The Doctors' Center Hospital and Pesquera cite Federal Rule of Evidence 403 (" Rule 403"), contending that Rojas' proposed testimony will "be unfairly prejudicial." Id. at p. 7. The Court disagrees.
"Relevant evidence is admissible unless any of the following provides otherwise: the United States Constitution; a federal statute; [the Federal Rules of Evidence]; or other rules prescribed by the Supreme Court." Fed. R. Evid. 402. "Irrelevant evidence is not admissible." Id."Evidence is relevant if: (a) it has any tendency to make a fact more or less probable than it would be without the evidence; and (b) the fact is of consequence in determining the action." Fed. R. Evid. 401. The Federal Rules of Evidence "set a very low bar for relevance." United States v. Rodríguez-Soler, 773 F.3d 289, 293 (1st Cir. 2014) (internal citation omitted).
Relevant evidence may be excluded, however, "if its probative value is substantially outweighed by a danger of ... unfair prejudice." Fed. R. Evid. 403. "In balancing the scales of Rule 403, it is important to note that only unfair prejudice is to be avoided, as by design, all evidence is meant to be prejudicial." United States v. Morales-Aldahondo, 524 F.3d 115, 119 (1st Cir. 2008) (internal quotation marks and citation omitted). "Evidence is generally deemed unfairly prejudicial if it has an undue tendency to prompt a decision by the factfinder on an improper basis." United States v. Benedetti, 433 F.3d 111, 118 (1st Cir. 2005).
2. The Testimony that the Plaintiffs Intend to Elicit from Boris Rojas is Relevant and Not Unduly Prejudicial
The testimony that José Díaz, Olga Díaz and Ramos intend to elicit from Rojas is relevant to the medical malpractice claims set forth in the complaint. (Docket No. 1.) Pursuant to Puerto Rico law, "individuals who are harmed because a close relative or loved one is tortiously injured may invoke Article 1802 as a vehicle for prosecuting a cause of action against the tortfeasor." Díaz-Nieves v. United States, 858 F.3d 678, 689 (1st Cir. 2017) (citation omitted). To prevail on a derivative medical malpractice claim, the plaintiffs must demonstrate that: (1) they suffered emotional harm, (2) their emotional harm resulted from the defendants' tortious conduct toward Zoraida Díaz, and (3) the defendants' "conduct was tortious or wrongful." Díaz-Nieves, 858 F.3d at 689.
José Díaz, Olga Díaz and Ramos may seek "compensation for the sufferings, emotional distress, or mental anguish they experienced as a consequence of the material or other damages caused directly to [Zoraida Díaz]." Santana-Concepción v. Centro Médico del Turabo, Inc., 768 F.3d 5, 10 (1st Cir. 2014) (quoting Santini Rivera v. Serv. Air., Inc., 137 D.P.R. 1 (1994). Because "a cause of action under Article 1802 'is wholly derivative ... its viability is contingent upon the viability of the underlying [claim].' " Costa-Urena v. Segarra, 590 F.3d 18, 30 (1st Cir. 2009) (citation omitted); see Díaz-Nieves, 858 F.3d at 689 ("Because, as previously discussed, the district *233court correctly dismissed Joel's claims, the derivative claims of his relatives were also properly dismissed."). Accordingly, the plaintiffs' medical malpractice claim is contingent on a finding of negligence on the part of the defendants toward Zoraida Díaz. See Méndez-Matos, 557 F.3d at 57 (holding that an Article 1802 claim asserted by the son and wife of a falsely imprisoned individual "is derivative and depends on the viability of the underlying claim of the relative or loved one").
Medical malpractice liability in Puerto Rico is fault based. Rodríguez-Díaz v. Seguros Triple-S, 636 F.3d 20, 23 (1st Cir. 2011). Pursuant to Article 1802, "a person who by an act or omission causes damage to another through fault or negligence shall be obliged to repair the damage done." P.R. Laws Ann. tit. 31, § 5141. "Within this rubric, three elements coalesce to make up a prima facie case for medical malpractice (a species of professional negligence)." Martínez-Serrano v. Quality Health Servs. of P.R., Inc., 568 F.3d 278, 285 (1st Cir. 2009). To prove medical malpractice in Puerto Rico, a plaintiff must establish: " '(1) the duty owed (i.e. , the minimum standard of professional knowledge and skill required in the relevant circumstances), (2) an act or omission transgressing that duty, and (3) a sufficient causal nexus between the breach and the claimed harm.' " Torres-Lazarini v. United States, 523 F.3d 69, 72 (1st Cir. 2008) (citing Cortés-Irizarry v. Corporacion Insular De Seguros, 111 F.3d 184, 189 (1st Cir.1997) ).
The Doctors' Center Hospital and Pesquera attempt to isolate Zoraida Díaz from this litigation, placing the plaintiffs' medical malpractice claim in a vacuum. The Court is cognizant that Zoraida Díaz is not a party. The purported misdiagnosis of Zoraida Díaz, however, is relevant and integral to the plaintiffs' claims. Testimony "that the TTP ... caused the permanent Center Nervous System damage" is critical, particularly with regard to the causation element of plaintiffs' negligence claim. (Docket No. 58 at p. 35.) This evidence is also material to the emotional damages allegedly sustained by José Díaz, Olga Díaz and Ramos. The Doctors' Center Hospital and Pesquera provide no reason for the Court to conclude that the probative value of Rojas' proposed testimony is substantially outweighed by the danger of unfair prejudice. Accordingly, the Court DENIES the defendants' motion to preclude expert testimony by Rojas.
B. Testimony by Katia Dávila-Díaz
The defendants move to preclude the testimony by Dávila for two reasons. (Docket No. 53 at p. 7.) First, the Doctors' Center Hospital and Pesquera contend that Dávila's proposed testimony exceeds the scope of the plaintiffs' Rule 26 disclosure. Id. at p. 8. Second, the defendants maintain that Dávila's proposed testimony "is an attempt by plaintiff to bring forth to the jury the damages of Zoraida that certainly, if heard by the jury, will certainly confuse the jury at the time of assessing the award for damages of the federal plaintiffs." Id. at p. 9.
The parties need not detail with specificity the testimony of potential fact witnesses pursuant to Rule 26. The initial disclosure requirements mandate that parties name "each individual likely to have discoverable information - along with the subject of that information - that the disclosing party may use to support its claims or defenses, unless the use would be solely for impeachment." Fed. R. Civ. P. 26(a)(1)(A)(i). José Díaz, Olga Díaz and Ramos stated that Dávila "has knowledge of Zoraida Díaz Casillas's treatment, condition and current physical state." (Docket No. 53, Ex. 1 at p. 2.) This disclosure is sufficient pursuant to Rule 26.
*234The plaintiffs also seek to elicit testimony from Dávila concerning the "plaintiffs' relationships past and present with her mother as well as how her mother's present condition has affected them." (Docket No. 58 at p. 32.)13 Whether this testimony is relevant, not unduly cumulative, and is supported by a proper foundation will be determined in the context of trial.
The Court rejects the defendants' contention that the jury will award the "damages of Zoraida" to José Díaz, Olga Díaz and Ramos. (Docket No. 53 at p. 9.) The Court will instruct the jury that the plaintiffs are eligible only for damages arising from their own emotional distress, not for the damages sustained by Zoraida Díaz or Dávila.14 Accordingly, the plaintiffs' motion to restrict Dávila's testimony is DENIED.
C. Testimony by Iris González
The Doctors' Center Hospital and Pesquera move to preclude testimony from González, the woman who accompanied Zoraida Díaz to the Doctors' Center Hospital. (Docket No. 53 at pp. 7-9.) The plaintiffs "have decided to waive the use of this witness for trial." (Docket No. 68 at p. 18.) Accordingly, the defendants' motion to preclude testimony by González is MOOT.
D. The "Day in the Life" Video
The plaintiffs seek to introduce a "Day in the Life" video into evidence. The video is approximately five minutes long. (Docket No. 71.) In the video, Zoraida Díaz is bed-ridden and her body is stiff. Id. Dávila bends her mother's fingers, arms, and legs; changes her catheter; dries her hair; and performs what appears to be visual therapy. Id. The defendants contend that the video is unduly prejudicial "because it introduces a factor into the case that might encourage the jury to dislike or disapprove of the defendant independent of the merits." (Docket No. 53 at p. 14.) According to the defendants, the "Day in the Life" video *235will confuse the jury pursuant to Rule 403. Id. The defendants' arguments are unavailing.
The Court possesses "broad discretion in ruling on the admissibility of tape recordings, even where portions of the tapes are unintelligible." United States v. Font-Ramírez, 944 F.2d 42 (1st Cir. 1991) (affirming admission of video footage that "place[d] Bouret and the defendants together in the apartment, corroborating Bouret's direct testimony"). Video evidence "must be judged under its own particular facts taking into account the specific purposes for which this type of evidence is submitted." Szeliga v. Gen. Motors Corp., 728 F.2d 566, 567 (1st Cir. 1984) ; Farley v. United States, 98 F.Supp.3d 299 (D.N.H. 2015) (permitting the plaintiffs to admit a "day-in-the-life" video of a stroke victim suffering from a "locked-in syndrome"); García-Colón v. García-Rinaldi, No. 01-1571, 2006 WL 3421862, *13, 2006 U.S. Dist. LEXIS 86418 *39, 40 (D.P.R. Nov. 28, 2006) (Domínguez, J.) (granting motion to introduce "the film A Day in the Life [of plaintiff] provided proper safeguards are taken [and] the court is also to provide an instruction as to the lighting of the film and any other potential inflammatory matter").
The "Day in the Life" video of Zoraida Díaz is relevant to the emotional distress experienced by the plaintiffs. The video also provides corroborating evidence regarding the plaintiffs' claim that Zoraida Díaz remains in a "permanent vegetative state." (Docket No. 1 p. 12.). The Court carefully reviewed the video and conducted a Rule 403 analysis. The probative value of the video is not substantially outweighed by the danger of unfair prejudice. Before publication to the jury, the plaintiffs must properly authenticate the video. Accordingly, the defendants' motion to exclude the "Day in the Life" video is DENIED.
IV. Conclusion
For the reasons set forth above, the plaintiffs' motion to preclude the defendants from calling expert witnesses at trial is MOOT. (Docket No. 65.) The plaintiffs' motions to preclude Miller and Dávila's deposition transcripts are DENIED. (Docket No. 66 and 67.) José Díaz, Olga Díaz and Ramos are ORDERED to submit an errata sheet identifying any proposed change to Kenneth Miller and Katia Dávila's deposition transcripts no later than October 30, 2018. No extensions will be granted. The defendants' motion in limine is GRANTED IN PART and DENIED IN PART. (Docket No. 53.) The pretrial conference and trial are set for February 15, 2019 and February 25, 2019 , respectively, beginning at 9:00 a.m. No later than February 1, 2019 , the parties may file an amended joint proposed pretrial order, amended proposed voir dire questions and amended proposed jury instructions in accordance with this Opinion and Order.
IT IS SO ORDERED.