How about Jim Caldwell. Manning hits the wall early and skills erode game-by-game yet his stubborness leads him to resist change and he continues to throw pick after pick and make bad decision after bad decision until the lockerroom finally (but quietly) loses complete faith in him. The team goes win-loss for a stretch and then everything breaks down and the Colts go on a 6 game losing streak and their record falls to 5-10 before game 16. Colts starters decide to play in the final game of the season to end on a 'high' but the team they are playing doesn't play it's starters yet the Colts get blown out 55-6. Manning throws 5 INTs and is pulled midway through the 3rd quarter. Curtis Painter throws 3 picks to end the game. The Colts finish 5-11. Manning finishes the season with a 48 QB rating and goes 18 TD for 35 INTs. The Media turns it's attention to the Colts who had signed Manning to a 7-year $220 million contract in October. Polian releases Manning 5 days after the 4th New England Patriots Super Bowl victory over the Green Bay Packers. Lockerroom turmoil and leadership breakdown leads to Polian firing coach Caldwell and his staff. Manning vowes to return to greatness signs with the 2-14 Buffalo Bills, only to be released on September 11, 2011 after a game 1 9/11 tribute loss to America's Team the New England Patriots. Manning throws 7 INTs on his first 6 passes in that game, his fourth pass is picked off by Wilhite who fumbles it back to Manning who proceeds to throw it right on the numbers of Nose Tackle Vince Wilfork for yet another pick. The next day Manning retires. The Colts go 0-16 for the next 3 years. Jim Irsay moves the team to Canada.