The Mets selected Lavender's contract from Triple-A Syracuse on Tuesday.
Lavender missed all of 2025 and most of 2024 due to a pair of left elbow surgeries, but he's looked sharp in the minors this season, turning in a 3.27 ERA and 53:11 K:BB over 33 innings with Syracuse. The southpaw will be making his major-league debut when/if he enters a game.