What's trending in the NFL: Deadline on Peyton Manning's decision; Cam Newton says he's a 'sore loser'

The Broncos celebrate (1:22)

John Elway, Peyton Manning, Von Miller and others address the crowd in downtown Denver as the team celebrates its' third Super Bowl title. (1:22)

Here are the top stories from Tuesday:

Carolina quarterback Cam Newton defends his walking out of news conference after Super Bowl loss (by David Newton)

Broncos would like to know Peyton Manning's decision before March 9 (by Jeff Legwold)

Source: Johnny Manziel "hung over" at meeting; Browns say quarterback had concussion (by Pat McManamon)

From Mike Sando's story on former Seahawks running back Marshawn Lynch's case for the Hall of Fame: "We will not remember Lynch as a compiler of stats. He was a game-changing force. A long list of running backs have rushed more times for more yards than Lynch, but few struck fear into opposing coaches and players the way Lynch consistently did during his five-plus seasons with the Seattle Seahawks."

From Kevin Seifert's story on the NFL's offseason priorities: "No matter how often NFL officials insist that there are no viable alternatives, the league is faced with a clear reality: A significant cross section of fans, media members, players and coaches simply don't understand -- or don't accept -- what should be a simple rule."

Philadelphia police complete investigation into alleged nightclub assault of two of the city's off-duty police officers involving Bills running back LeSean McCoy (by Mike Rodak)

Despite rash of retirements, no sign Julius Peppers is ready to call it quits (by Rob Demovsky)

From Phil Sheridan's story on the "Chip Kelly guys" left on the Eagles' roster: "When Kelly was fired in December, being a Kelly guy was not a positive indicator. Eagles owner Jeff Lurie and executive vice president Howie Roseman have done their best to erase Kelly's imprint on the franchise."

From Ian O'Connor's story on Super Bowl week highlighting the NFL's health crisis: "The time for sugarcoating is finally over in this $12 billion-and-counting industry. Between today and opening night in September, Goodell should spend every waking minute on this issue, and not on what defines a catch. He should first admit to the league's past mistakes in denying a link between football and brain disease, and then pledge to commit every available penny of research funding to truly independent doctors and scientists, not to those league-friendly types inclined to give the home team a favorable call or three."

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From ESPN Stats & Information research: Marshawn Lynch gained 488 yards after contact in the postseason from 2010-15, 270 more yards after contact than the next-closest running back.