"Other than it being numb, it didn't feel too bad," Hafner said after the game. "So I think I should be all right."
The veteran has struggled at the plate after getting off to a hot start in April. He's batting just .175 since May 1, and he hasn't hit a home run since June 25.
Overall, he's batting .215 with 12 home runs and 37 RBIs.
"I feel good," he said. "I just want to go out there, contribute and help the team."
Josh Vitale is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.