ENGLEWOOD, Colo. -- The Denver Broncos' depth chart at tight end suddenly has Jeff Heuerman at the top of the list.

That's because Virgil Green and A.J. Derby each suffered a concussion in the Sunday's 16-3 loss to the New England Patriots. Both players are currently in the league's concussion protocol and both players did not finish out the workday Monday before being sent back home.

Green suffered his concussion with 9 minutes, 5 seconds remaining in the first quarter when he was hit by Patriots' defensive end Chris Long on a 9-yard reception. Green left the game at that point and did not return.

Derby played 30 plays in the game, including deep into the fourth quarter, and finished with four receptions for 35 yards. He has been the leading option in the passing game since he was acquired in a trade from the Patriots last month. Derby has 14 receptions in the last four games combined.

"I just know after the game, (Derby) came in he talked to (head trainer Steve Antonopulos), talked to the doctors," Kubiak said of Derby. "So he and Virgil are not here (Monday), they've been sent home."

That makes Heuerman, who had two catches for 40 yards Sunday, including a season-best 31-yarder, the only healthy tight end on the 53-man roster. The Broncos do have two tight ends -- Steven Scheu and Henry Krieger-Cole -- on the practice squad and would have to make a roster move to promote either one of them.

The other significant injury from Sunday's game was to defensive end Derek Wolfe, who left in the second quarter with a neck injury and did not return.

Wolfe was evaluated Monday morning and Kubiak said he had some optimism about Wolfe's availability for the Christmas night game in Kansas City.

"Actually Derek's doing pretty good (Monday)," Kubiak said. "Derek's got a neck issue, something he's been dealing with last couple months really. I'd said he's day-to-day."