Indianapolis Colts receiver Austin Collie, who has a history of concussion problems, took a blow to the head that knocked him out of Sunday's game against the Steelers. He was being evaluated for concussion symptoms after leaving the game, according to NFL.com. Collie was injured when he took forearm to the helmet from the Steelers' Larry Foote as Collie was being brought to ground after attempting to catch a pass over the middle from Andrew Luck. Collie played in 16 games last season, including five starts, and caught 54 passes. Two Colts defensive ends -- Robert Mathis (shoulder strain) and Cory Redding (leg) - also had to leave the game.