Via Rotoworld.com:

BAND-AIDLucas Duda is not in the Mets’ lineup Tuesday due to stiffness in his right knee.
Duda was hit by a pitch on the knee during Sunday’s game. He was able to stay in that contest but obviously is feeling the effects a day later. The good news is that Duda thinks he’ll be fine to play on Tuesday. Michael Cuddyer is at first base Monday, with Darrell Ceciliani covering left field.