The Pirates acquired Weaver and cash considerations from the Mets on Monday in exchange for shortstop Sammy Stafura, Jorge Castillo of ESPN.com reports.
Weaver receives a potentially big boost in fantasy value with a move to Pittsburgh, where he could be the favorite to serve as the Pirates' closer. The righty reliever has posted a 1.84 ERA and 45:11 K:BB over 44 innings this season for the Mets. Weaver is under contract for 2027 as well, with a salary of $12.5 million.