After an 0-for-4 performance against the Royals on Friday night, Crawford is 2-for-25 in his last seven games.
"I don't know for sure if it is fatigue, but just as much as that, it's a physical and mental break right now," Bochy said.
Rookie Matt Duffy filled in for Crawford on Saturday.
Jackson Alexander is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.