NEW YORK -- San Francisco Giants catcher Buster Posey was removed from Tuesday night's game with left knee discomfort.
Posey was visited by manager Gabe Kapler and a trainer during the fourth inning against the New York Mets. Posey was replaced by backup Curt Casali an inning later with San Francisco ahead 7-0.
Kapler said after the game that Posey was day to day.
Posey, 34, has had a resurgent season for the major league-leading Giants. The 2012 NL MVP singled and scored in the top of the fourth inning to raise his batting average to .314 with 39 RBIs and a .925 OPS.