The Mets optioned Weisenburger to Triple-A Syracuse on Wednesday.
Though he allowed one run over 1.1 innings in Tuesday's loss to the Padres, Weisenburger's first big-league stint went well, as he logged a 2.08 ERA and 4:2 K:BB over 4.1 frames. Chayce McDermott will grab Weisenburger's spot on the active roster.