Hamilton said he felt a spasm in his back about the third or fourth step out of the batter's box on an RBI single in the first inning of Sunday's 5-2 loss to the Tampa Bay Rays. He tried to loosen it up, but after playing the field in the second inning, he felt like he couldn't move the way he wanted and told manager Ron Washington, who took him came out of the game. Hamilton said it's happened to him before and that it takes about 12 hours to loosen up.
"I don't expect it to affect anything tomorrow," Hamilton said.
Hamilton said he doesn't sleep on planes anyway, so he'll get up and move around as much as he can during the club's overnight flight to Toronto.
"I'm not worried about it because I didn't feel anything alarming," Hamilton said. "It was a little tight when I woke up this morning, but nothing out of the ordinary -- come in, get loose and get after it. It was just an ordinary day until the spasm wouldn't release on me."