"I'm concerned about [Crawford] pushing it and injuring his hamstring," Bochy said.
Crawford said he felt a tweak as he ran out a 10th-inning bunt single during the Giants' 3-2, 12-inning victory in Tuesday's series opener.
"Hopefully I'll be fine for [Thursday]," Crawford said.
Crawford went to the bench with a .318 batting average in 13 games. He also owned a seven-game hitting streak, during which he has built a .400 average (10-for-25).
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.