"We saw it last time we were home," Collins said. "When the weather starts to warm up, the ball's going to carry a lot better here, so it'll play differently."
Collins said he was surprised that deep balls off the bats of David Wright and Ike Davis on Saturday went for outs, and he believes that moderate air temperatures have kept more balls in the yard at Citi Field.
"That cool air just knocked them down, but when it starts to heat up, you're going to see a difference in how the park plays."
The Mets rank 11th in the National League with 53 home runs entering Sunday, 26 of which have been hit at Citi Field.