Jason Vargas (2-8, 8.75 ERA) had been the listed starter, but Callaway announced the change Wednesday. DeGrom started the Mets' 8-0 victory against the Cincinnati Reds on Wednesday afternoon, getting the win with six scoreless innings in which he struck out 10 batters. His start against the Yankees will be on normal rest.
DeGrom leads the majors with a 1.77 ERA but is 6-7 because of the lack of run support in his starts.
Monday's game at Yankee Stadium (7 p.m. ET, ESPN) is the makeup of a game postponed due to rain on July 22.