Lambo, 28, is fully cleared for all baseball activity just three months after undergoing surgery for testicular cancer, having avoided radiation treatment. He's been working out on his own for nearly a month and hopes to latch on with a winter ball team.
"I think he's in a good place," A's manager Bob Melvin said. "I talked to him some earlier about this maybe affecting him for a while now. Now he knows, he's got it cleared up and seems to be in really good spirits, so it's really good to have him here."
Lambo was on the A's Opening Day roster but had just one at-bat before being optioned to Triple-A Nashville, where he hit .