Broncos LB Dre Greenlaw suspended by NFL after his first game back

Dre Greenlaw was seen going after Brad Allen

A video captured by Alex Wilcox of CBS News Colorado appeared to show Greenlaw going after Allen as the Broncos were celebrating kicker Wil Lutz's 39-yard game-winning field goal. Greenlaw ran toward Allen and looked like he was shouting at the referee before pointing at him in a threatening fashion.

Though the game had ended, Allen threw a flag. A teammate then came over to pull Greenlaw away.

Drew Greenlaw put a damper on his Broncos debut

It is unclear why Greenlaw was so angry with Allen, but the Broncos were on the wrong end of a pass interference call late in the fourth quarter. Denver was leading 30-26 when cornerback Riley Moss was called for a questionable pass interference penalty on Giants wide receiver Beaux Collins with 40 seconds remaining in the game.

The penalty put New York at the 2-yard line. The Broncos were then called for unsportsmanlike conduct after head coach Sean Payton came out to protest the call. That gave the Giants the ball at the 1-yard line, and Jaxson Dart ran for a go-ahead touchdown on the following play.

Denver still managed to come back and win, but Greenlaw was obviously furious about something. The 28-year-old signed a three-year, $35M deal with the Broncos during the offseason and was held out for the first six weeks because of a quad injury. He had six total tackles in his debut with the team on Sunday, but he may now have to take another week off.