Posey indicated that he didn't hurt in a particular incident. "It's been gradual," he said of his discomfort.
Giants manager Bruce Bochy said that the possibility of excusing Posey from participating in Tuesday's All-Star Game presented by T-Mobile was not discussed. Posey, a three-time All-Star, was elected to start in the Midsummer Classic for the second time.
Posey, 28, entered Wednesday batting .300 with 14 home runs, 57 RBIs and an .865 OPS.
Chris Haft is a reporter for MLB.com. Read his blog, Haft-Baked Ideas, and follow him on Twitter at @sfgiantsbeat. This story was not subject to the approval of Major League Baseball or its clubs.