A's manager Bob Melvin said there should be no issues for Willingham with running the bases or playing left field.
"That's the reason we went the extra yard," Melvin said. "Hopefully, it's not an issue. And if I was only able to DH him, I probably wouldn't have activated him. He even said when he was doing the rehab that he'd get stiff moreso DH-ing and sitting around between at-bats. The focus all along was once we get him back, we'd be able to play him in the outfield."