Kerry Collins, lured out of retirement to back up the Colts' star quarterback Peyton Manning, saw his season end as the team placed him in injured reserve with a concussion. The move comes two months after the 17-year NFL veteran signed with the Colts, who gave him a $4 million deal to tempt him to reverse the decision to retire he had announced in July. When Manning needed another neck surgery in September, Collins was promoted to starter. He started three games, getting knocked out in the third quarter against Pittsburgh. He hasn't played a down since. The whole season has been a disaster for the Colts, who are without a victory and don't expect Manning to resume training before December. Despite that, team vice chairman Bill Polian said the Colts wouldn't take a chance with the head injury to Collins. "Concussions are a hot-button issue as you know," Polian said in a radio interview on Monday. The Colts now have three quarterbacks on the active roster -- Curtis Painter, who took over as the starter when Collins was injured, Manning, the four-time NFL Most Valuable Player, and and veteran backup Dan Orlovsky.