"He was a little bit sore just from running around, but he's telling me he can play tomorrow," said manager Bob Melvin. "We'll see."
Melvin, still trying to ease his outfielder back into action, would DH him again if he does play in the series finale.
The A's went 2-2 during Cespedes' absence and are 180-103 all-time when he's in the starting lineup, compared to 27-41 when he doesn't.
Jane Lee is a reporter for MLB.com. Read her blog, Major Lee-ague, and follow her on Twitter @JaneMLB. This story was not subject to the approval of Major League Baseball or its clubs.