A day after saying health will be one of the keys to whether he plays long enough to have a chance to break Hank Aaron's career home run record, Barry Bonds was scratched from San Francisco's lineup because of a sore back. The slugger told Giants manager Felipe Alou about three hours before Tuesday night's game against the Marlins that he had some tightness in his back, though Alou didn't get the sense the injury was serious. "I don't think it's a big deal," Alou said, adding he thought the problem likely was related to the cross-country trek the Giants made to South Florida late Sunday.