Irrelevant evidence is inadmissible.

McDonough v. City of Quincy, 452 F.3d 8, 21 (1st Cir. 2006) (holding, in plaintiff police officer's unlawful retaliation action against defendant city, that the trial court properly admitted the out-of-court statements....A statement is imputed to a principal or to an employer and is treated as the principal's or employer's vicarious admission (which, like other admissions is exempt from the hearsay rule) if the principal or employer is a party, the statement is offered against the principal or party, the statement is a statement by the party's agent or employee about a matter within the scope of the agent's agency or the employee's employment, and the statement is made during the principal-agent or employer-employee relationship.

Field v. Trigg County Hospital, Inc., 386 F.3d 729, 735-736 (6th Cir. 2004) (holding, in plaintiff spouses' action against defendants hospital and physician for malpractice and negligence, that the statements of unnamed physicians were....Hearsay is a statement that (i) is made other than at the trial or proceeding at which it is offered and (ii) is offered to prove the truth of the matter asserted by the maker of the statement, the declarant.

Cf. United States v. Green, 541 F.3d 176, 180 (3d Cir. 2008) (vacating conviction for distribution of cocaine base because the trial court erroneously admitted Brown's statement as a present sense impression because it....To fall within the hearsay exception created by Federal Rule of Evidence 803(1) or a comparable State rule for present sense impressions, a statement by the declarant (the maker of the statement) must be made at the time the declarant perceives the event or condition that the statement describes or explains, or immediately thereafter.