Red Sox left-hander Jon Lester left Tuesday night's game against the Blue Jays with a no-hitter through four innings. Lester suffered a lower lat muscle strain and will be re-evaluated on Wednesday. According to a team source, this type of injury could sideline a pitcher for 2-4 weeks. "It was sore. It hurt," Lester said. "I would never take myself out of the game if it wasn't for something significant. We'll get it looked at tomorrow and see how I feel. Hopefully we've got the All-Star break worked in and hopefully we don't have to do anything drastic around here." Lester, who is 10-4 with a 3.31 ERA this season, explained that he didn't suffer the injury on one particular pitch. He felt the discomfort during the entire fourth inning.