Among the myriad records that Manning holds as he retires is an important one for his post-NFL career: According to Spotrac, a site that tracks and analyses contracts in professional sports, Peyton Manning has earned over $248 million in his 18-year career.

Manning has won a record five NFL MVP awards, and he is coming off a season in which he became the oldest quarterback to win the Super Bowl at 39 years old. In his four years with the Broncos, Manning led the team to four American Football Conference (AFC) West Division titles and four corresponding playoff appearances, culminating in a Super Bowl 50 victory.

He was cut by the Indianapolis Colts, where he had spent the first 14 years of his career, before eventually arriving in Denver the following season with few pundits predicting the spectacular renaissance that was to follow.

He has the most passing yards in a season (5,477 in 2013) and touchdown passes (55 in 2013).

Manning follows in the footsteps of Broncos' boss John Elway, who retired after winning back-to-back Super Bowls in 1997 and 1998. A source familiar with the quarterback's decision told ESPN's Chris Mortensen said that will happen Monday.

Furthermore, dirty off the field secrets from Manning's past have surfaced within the last couple months and caused some to question the quarterback's true character.

Reports: Broncos quarterback Peyton Manning to announce retirement Monday

During the season, he was forced to deny stories linking him to human growth hormone, and since the Super Bowl his name has surfaced in a lawsuit which alleges the University of Tennessee created a "hostile sexual environment" with an attitude of indifference towards alleged assaults by student-athletes.

Manning worked his way into the starting lineup as a freshman after a season-ending knee injury to Jerry Colquitt in the opener against UCLA and three weeks later future Colorado Rockies superstar Todd Helton suffered a knee injury of his own.

New York Giants: "Congrats on a SUPER career Peyton Manning!". Peyton Manning changed the way the quarterback position is played. Elway has been the general manager of the Broncos since 2011, and signed Manning from Indianapolis before the 2012 season.

"I think I understand whether you can still contribute and help and if you're in the way and just hanging on or in the way, a nuisance to a team", he said.

The lasting image of Manning's spectacular career will be of him holding the trophy for Super Bowl 50.

"Peyton's competitive fire and love of the game made him a legendary player who thrilled fans for a generation", National Football League commissioner Roger Goodell said in a statement. But when you factor in the playoffs, Manning pulls away in first with a nice round total of 200.

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