Everybody thought that Manning’s career was over after he left the Colts. He returned from neck surgery but Indianapolis thought that it wasn’t worth the gamble. It helped that they tanked the season that he sat out and they replaced him with Andrew Luck. But Manning still had suitors and went to the Mile High City.
They became a contender in his second season and went to the Super Bowl. But he had a bad game and they suffered a shocking loss. People wrote him off again but Manning stormed back the following year. He captured an elusive second ring with Denver as well, even if he didn’t play very well (via Colts.com).