Morris Claiborne has noticeably gained muscle in his upper-body during the offseason. It's something that the former sixth overall draft pick said he wanted to do entering his second-year with the Dallas Cowboys. So far, an increased weight-lifting regimen and improved diet have led to Claiborne gaining six pounds. Playing in Monte Kiffin's new Tampa-2 defense will likely call for the 193-pounder to be more physical than he has been, but that doesn't mean Kiffin wants the starting cornerback focused solely on bulking up. "You want guys to work out year-round and lift weights but I'm not looking for Mo Claiborne to be some 225-pounder or something like that," Kiffin said after organized team activities on Tuesday. "Just use his speed, that's all I care about. They'll tackle. But it's about your strength and conditioning."