Scary scene for Pats as Gronk carted off field with knee injury

After being carted off the field, Rob Gronkowski was seen walking out of the training room after the Patriots’ 30-24 loss at Denver on Sunday night with a slight limp.

FS1 NFL Insider Mike Garafolo reports from sources that the knee injury suffered by the tight end is not believed to be a season-ender.

He will undergo additional testing on Monday.

"He’s been through a lot. He’s a tough guy. Hopefully it’s not too serious. We’ll see," Patriots quarterback Tom Brady said. "But all of our fingers are crossed."

Gronkowski was taken off the field on a cart in the fourth quarter after taking a hit to his right knee late in Sunday night’s game against the Broncos in Denver.

Gronkowski laid out to try to make a catch while Denver defensive back Darian Stewart dove to try to break up the play. Stewart seemed to only brush Gronkowski’s knee as he dove trying to make the tackle, and the tight end lay on the field, writhing in pain.

"I hate to see it but it’s really the only way for defenders to hit now," Brady said. "I bet if you ask a bunch of players they’d rather you go high than low. When you go low that’s what happens. I don’t think it’s dirty. I just think it’s the way football’s being played now."

The worst thing New England fans probably thought could happen on Sunday night was a loss by their Patriots. Well, they got that loss … but the scariest part of the night was likely Rob Gronkowski in a heap in the snow late in the game.

Gronkowski fell awkwardly to the ground and needed assistance to get on the cart. The Patriots immediately declared Gronkowski out for the remainder of the game.

The sixth-year tight end entered the game with 51 catches for 843 yards and eight touchdowns. In his career, Gronkowski, 26, has 359 catches for 5,222 yards and 62 scores. Before he was injured, Gronkowski had six catches for 88 yards and the game’s first touchdown, a 23-yarder in the first quarter.

The Patriots offense has sustained several injuries over the course of the last month including running back Dion Lewis, wide receivers Julian Edelman, Danny Amendola and Aaron Dobson.

— The Associated Press contributed to this report