Peyton Manning's season is in jeopardy after he had to have his third neck operation in two years, reports ESPN. The Colts QB will be out at least two to three months, though the team is downplaying the seriousness and says it expects him to return at some point. At Sports Illustrated, however, Will Carroll says the recovery time for this procedure—something called a "single level anterior fusion"—is typically up to a full year, and he suggests it's possible the great No. 18 has played his last game. (More Peyton Manning stories.)