Posey's on pace to start a career-high 124 games at catcher this season.
"Most likely he'll get a day off in Pittsburgh," Bochy said.
Posey has accelerated his production lately, batting .385 (10-for-26) with three home runs in his past seven games entering Sunday.
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.