deGrom is dealing with a stiff neck and will have his next start pushed back to Saturday, Ken Rosenthal of FOX Sports reports.

EDGE Analysis

Matt Harvey will switch spots in the rotation, matching up with Tanner Roark for Friday's series opener. It appears to be a simple precautionary move for the Mets at this point and still allows both aces to start in a pivotal three-game set, but it could be a situation worth keeping an eye on. deGrom is off to a great start on the season, with a 1.89 ERA and a 22:4 K:BB.