Derek Norris walks the walk of someone in serious hurt.

And he's feeling better.

Norris could barely walk at all Saturday when leaving Rogers Centre after he'd suffered a back spasm in his final at-bat. Team massage therapist Ozzie Lyles came by later in the evening to try and help relieve the stiffness in the right side of Norris' back and by Sunday morning the catcher was upright mostly and moving slowly.

"I can walk without pain but my alignment is off" Norris said. "I look like I'm surfing. I look at myself in the mirror and I try to straighten up."

Norris more than likely won't be able to play Sunday so he let the trainers work on the players who would play. Then when they took the field for batting practice he took his turn in the trainers' room. Norris said he doubted he'd be available to play but manager Bob Melvin wouldn't go quite that far.

"He won't be out for batting practice" the manager said. "But he feels better than he did yesterday. We'll see how he feels later."

With Norris out of action that leaves Josh Donaldson as the only catcher available to the A's as a backup. He's been a third baseman for the last two seasons but he came to the big leagues as a combination catcher/third baseman so he has some experience with the job and the A's always travel with a full complement of catching gear for him just for situations like this.