It’s been almost a week since Peyton Manning retired from the NFL after a magnificent 18-year career that included time with the Colts and Broncos.Manning ended his career the way he should have, with a Super Bowl victory over the Carolina Panthers, and putting an end to the dab. Manning is the only starting quarterback to win a Super Bowl with two different teams. The question everyone will now ask: Is he the greatest quarterback in his generation or even history?