According to the Denver Post the Oakland A's have shown interest in acquiring Byung-Hyun Kim.
I am not sure this is the best move that they could make for a 5th starter. Even with Kennedy's bad spring I don't think Kim will out-perform him.
Jon Leiber is also being shopped by the Phillies. He would make a much better 5th starter for the A's even though he would be more expensive than Kim.