SUMMARY ORDER

Atlas Solar Holdings, LLC and Yossef Kahlon (together, the “Kahlon Defendants”) appeal from (1) the February 2, 2016 judgment in favor of plaintiffs Troy Lambe, Sunray Solar Inc., and Max Diversified Inc. (together, “Plaintiffs”) entered in the United States District Court for the Eastern District of New York (Wexler, /.); (2) the January 29, 2016 order granting Plaintiffs’ motion for a directed verdict on the Kahlon Defendants’ counterclaim for fraud; and (3) the July 1, 2016 order denying the Kahlon Defendants’ motion to amend the judgment. We assume the parties’ familiarity with the underlying facts, procedural history, and specification of issues for review.

The Kahlon Defendants argue that the district court exceeded its discretion in not allowing them to seek a post-judgment setoff against the jury award pursuant to New York General Obligations Law § 15-108. We disagree. “[T]he New York Court of Appeals warned that ‘as an affirmative defense, General Obligations Law § 15-108(a) must be pled by a tortfeasor seeking its protection.’ ” Schipani v. McLeod, 541 F.3d 158, 161 (2d Cir. 2008) (citing Whalen v. Kawasaki Motors Corp., U.S.A., 92 N.Y.2d 288, 292, 680 N.Y.S.2d 435, 703 N.E.2d 246 (1998)). A party may move “at any point before final judgment is entered” to amend its answer to assert a setoff pursuant to Section 15-108. Id. at 159.

The Kahlon Defendants argue amendment of their 'answer was unnecessary because their answer already pled a setoff as an affirmative defense. Their answer pled, in relevant part, that:

The relief sought by Plaintiff against Defendants, if any be found, must be set off, reduced, abated and/or apportioned to the extent that Plaintiffs actions or omissions or bad faith caused or contributed to the damages and/or to the extent that Plaintiffs actions and/or omissions caused damage to Defendants.

App’x at 142.

This pleading is inadequate because the setoff it describes was to occur “to the extent that Plaintiffs actions or omissions or bad faith caused or contributed to the damages.... ” A plain reading of the defense, as pled, means any award to the Plaintiffs must be decreased to the extent that the Plaintiffs caused or contributed to the damages. The answer does not satisfy New York’s requirement that a Section 15-108 setoff be pled as an affirmative defense.

The district court did not exceed its discretion in denying the motion to amend post-judgment. “When the moving party has had an opportunity to assert the amendment earlier, but has waited until after judgment before requesting leave, a court may exercise its discretion more exactingly.” State Trading Corp. of India, Ltd. v. Assuranceforeningen Skuld, 921 F.2d 409, 418 (2d Cir. 1990).

Moreover, the Kahlon Defendants failed to properly preserve this issue for appeal. The Kahlon Defendants make their argument regarding the district court’s denial of its motion to amend in a footnote in their opening brief. Appellants’ Br. at 36 n. 13. “We do not consider an argument mentioned only in a footnote to be adequately raised or preserved for appellate review.” United States v. Restrepo, 986 F.2d 1462, 1463 (2d Cir. 1993). In their reply brief, the Kahlon Defendants reverse their position by stating in a footnote that they are not seeking to amend the answer. Appel *563 lants’ Reply Br. at 7 n.5 (“we do not seek to amend our Answer.”)-

We have considered the remainder of the Kahlon Defendants’ arguments and find them to be without merit. Accordingly, the judgment of the district court hereby ⅛ AFFIRMED.