UPDATE: Graham said X-rays on his ankle were negative, and he doesn't expect the injury to linger.

PHILADELPHIA -- Injuries have left a deep imprint on the Philadelphia Eagles' season, and the team couldn't avoid them Christmas Night.

Defensive end Brandon Graham, the Eagles' sacks leader and a team captain, hobbled off the field in the fourth quarter of Monday's game against the Raiders with an ankle injury. After trainers spent several minutes examining the 2016 second-team all-pro, Graham limped through a tunnel and into the locker room.

The Birds announced Graham was questionable to return.

While the Eagles can lean on impressive depth at defensive end -- veteran Chris Long and first-round rookie Derek Barnett have been productive off the bench this season -- they would likely feel Graham's absence if he were to miss significant time. Graham has 9.5 sacks on the year and owns a reputation as a talented run stuffer. He's also a vocal leader.

Philadelphia and Oakland were locked in a tight game game when Graham left the field -- the score was tied at 10 in the closing minutes. You can follow along with the action here.

If the Eagles (12-2) beat the Raiders, they'll clinch the top seed in the NFC.

-- @AaronKazreports