Josh Hamilton has been placed on the disabled list because of a strained muscle in his rib cage. The move is retroactive to April 27. Hamilton injured himself crashing into the wall in Toronto on April 21. He last appeared in a game Sunday as a pinch hitter. "I would have tried to rush back and probably ended up hurting myself," said Hamilton, who is eligible to come off the DL May 12. "I haven't been in teh right frame of mind mentally because of trying to push through the pain. The main thing I realize is that it's early."