http://www.rotoworld.com/player/nfl/7615/vick-ballard ESPN's Adam Schefter reports Colts RB Vick Ballard will miss the remainder of the season after suffering a knee injury in Thursday's practice.Ballard popped up on the injury report Thursday as a limited participant, but there was zero indication the injury was this severe. This news vaults Ahmad Bradshaw into the unquestioned lead-back role, making him a RB2/flex option this week against the Dolphins. Donald Brown will handle backup duties while the Colts look for a No. 3 back. We'll update Ballard's specific injury once we hear it.