Red Sox catcher Jason Varitek says he's fine with being Victor Martinez's backup heading into the 2010 season. Varitek will turn 38 shortly after the season begins next April. He acknowledged injuries last season, including a bulging disk in his neck, a broken big toe and a partial labrum tear in his left shoulder, but refused to blame the ailments on his drop in production. "I've got to listen to my body," Varitek said. "Now I feel strong and continuing to get stronger, so I feel really good. And if I'm able to maintain that, I don't know how long I'll play. But if my health is not there, that will be the determining point before anything."