Twins head athletic trainer Rick McWane said the soreness Joe Mauer is experiencing in his leg is because his body wasn't strong enough at the start of the season. "He, I don't think, has had the repetitions either for catching or anything else," McWane said. "Once the season started, he started to wear down." Mauer had surgery in December and he only played in eight games during spring training with the hopes that it would keep his legs fresh for the grind of catching in the regular season. "I was out there fighting it and my body just said I couldn't go anymore," Mauer said. "It's tough to admit that, especially with the things that guys play through. But it gets to a point where your body says you can't go anymore." Mauer said he is making progress, but he has yet to resume baseball activities. He was eligible to come off the DL on Thursday, but there is no timetable for his return.