EAST RUTHERFORD -- Giants running back Rashad Jennings is questionable for Sunday's NFC East showdown against the Redskins at MetLife Stadium.

Jennings has been limited in practice this week with a thumb injury. The veteran has expressed confidence he will be able to play, and head coach Ben McAdoo did not seem too concerned about his status Friday when speaking to reporters.

But Jennings now, at least according to the NFL's injury reporting guidelines, has a 50-50 chance to play against Washington.

Jennings was not included on the Giants' initial injury report, but a team spokesman said his omission was accidental. The NFL has eliminated the probable designation from the injury report process. At this point, Jennings is still likely to play with some sort of protection on the thumb.

For what it's worth, McAdoo called Jennings' injury "a banged-up wrist," but he has had a light cast on the left thumb. McAdoo said he was not worried about the prospect Jennings will be able to carry the ball with his right hand only.

"He's a veteran back. He's played a lot of football in this league. He's earned a spot," McAdoo said. "I'm comfortable with it."

Jennings has downplayed the injury all week. "That's a part of football. You got to battle through little things and even big things sometimes," he said earlier in the week.

Jennings' status further clouds the Giants' running back rotation. Shane Vereen had 14 carries to Jennings' 13 last week, with Jennings receiving just three carries in the second half.

Offensive coordinator Mike Sullivan sidestepped a question Thursday asking if Jennings' reduced workload in the second half against the Saints was a result of his injury, or a coaching decision. Jennings did have 18 carries in the Giants' Week 1 win over the Cowboys.

James Kratch may be reached at jkratch@njadvancemedia.com. Follow him on Twitter @JamesKratch. Find our Giants coverage on Facebook.