In a swap of former first-round picks who didn't live up to expectations, the Dallas Cowboys traded linebacker Bobby Carpenter to the St. Louis Rams for tackle Alex Barron on Monday. Carpenter, the 18th pick of the 2006 draft for the Cowboys, never settled in at inside linebacker in the 3-4 scheme and seemed more suited to play the outside linebacker position in a 4-3 alignment. Carpenter's best game might have come in the 2006 playoff loss to the Seattle Seahawks in which he started and had five tackles -- including one for a loss -- and deflected three passes. But when the Cowboys drafted Penn State's Sean Lee in the second round earlier this month, it signaled that Carpenter's time in Dallas was coming to an end. http://sports.espn.go.com/dallas/nfl/news/story?id=5177715
