The Colts will keep Peyton Manning on the active roster because owner Jim Irsay says there is an "outside chance" that the quarterback could return in December. "I didn't say Peyton out 4 season FOR SURE, keeping him on Active Roster n taking it month by month/Outside chance of return n December possible," Irsay wrote on his Twitter page. Indianapolis will play their final regular season game on Jan. 1. Manning was expected to miss at least two months after having neck surgery Sept. 8 and possibly more, which could cost the four-time league MVP the entire season.