Las Vegas Raiders star defensive end Maxx Crosby was already ruled out of Monday night's home game against the Atlanta Falcons because of an ankle injury, and now he confirmed earlier reports that he's set to have season-ending surgery. 

"As much as this pains me to write, I will not be playing the rest of the season," Crosby wrote on Instagram. "Second time this year getting rolled up on the same ankle and now it will require surgery … I will get this surgery & be on a war path for greatness everyday and be back the best version of myself."

The NFL Network reported on Saturday that Crosby will meet with a foot and ankle specialist on Monday. Meanwhile, ESPN reported that Crosby would likely have season-ending arthroscopic ankle surgery.

Crosby, who did not practice the past three days, has 7.5 sacks and 17 tackles for loss this season. He is just half a sack from becoming the third Raiders player since at least 1982 with 60 for his career.

Currently in his sixth season, the 27-year-old Crosby is a three-time Pro Bowler. He finished fourth in Defensive Player of the Year voting last season.

Crosby missed one game earlier this season because of injury. He had started every game each of the previous four seasons.

Quarterback Aidan O'Connell, who has a bruised left knee, is questionable. He has not practiced the past three days, but coach Antonio Pierce has expressed hope that O'Connell would play.

If O'Connell doesn't start, the Raiders will turn to Desmond Ridder, who would face his old club. Ridder started 13 games for the Falcons last season.

Also, cornerback Nate Hobbs did not receive an injury designation and was a full participant at practice Saturday. He hasn't played since Nov. 3 because of an ankle injury.

Defensive tackle Adam Butler (concussion) is questionable and cornerback Sam Webb (back) is doubtful.

The Associated Press contributed to this story.