Mercer remained in the game and singled in the bottom of the frame, but was limping badly on his way to first and didn't take the field for the fourth.
"He clipped me with his spikes," Mercer said after the game. "I wasn't cut. It's just a bad bruise. It is very sore. We'll see how it feels tomorrow."
George Von Benko is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.