Darrelle Revis has a torn anterior cruciate ligament in his left knee that will require surgery, a huge blow for the Jets that leaves coach Rex Ryan without his best defensive player.

A somber Ryan stopped short of ruling Revis out for the season Monday, saying he just learned of the MRI results. But Revis will have to wait two or three weeks before surgery, Ryan said, and the recovery from an ACL tear is usually six to nine months. So the chances of Revis returning this season appear extremely slim.

‘‘Thanks for all the support!’’ Revis wrote on his Twitter page Monday night. ‘‘It’s just part of the game, I'm already on my way to recover!’’

Ryan added that he will speak with Revis first before the team decides whether he will be placed on injured reserve.

‘‘It’s just disappointing,’’ Ryan said. ‘‘This guy wants to win. As great a player as he is individually, he’s a great teammate and just wants to win. That’s why he was so excited about this year.’’

Revis, a first-team All-Pro the last three seasons, was injured in the third quarter of the Jets’ 23-20 overtime victory at Miami Sunday, falling awkwardly and grabbing his knee even before he hit the grass. It was a noncontact injury, and he covered his face with gloved hands in obvious pain. He was able to walk off the field, but was taken into the locker room on a golf cart.

It was Revis’s first game after missing a week with a concussion sustained in the season opener against Buffalo. He had missed only three games before this season, all in 2010.

Ryan suspected the injury was serious when talking to Revis on the plane ride home. MRI results the next day confirmed the team’s worst fears.

‘‘It’s something we have to overcome as a football team. We’re going to lose that presence. I don’t know what else to say about it,’’ Ryan said.

Stafford in limbo

The Lions are dealing with a familiar but unwanted problem: an injury to Matthew Stafford. He left in the fourth quarter of Sunday’s overtime loss at Tennessee with a strained muscle in his right leg, and the last thing Detroit wants is a return to the days when its franchise quarterback wasn’t able to stay healthy.

‘‘We'll see how he progresses through this week,’’ coach Jim Schwartz said. ‘‘Friday we'll make a determination what that availability is [Sunday against Minnesota].”

Stafford didn’t have anything to add to Schwartz’s assessment, and said he’d talk to the reporters Wednesday.

Bush’s knee OK

Tests performed on Reggie Bush’s left knee showed no serious injury, meaning the Dolphins may have their top offensive player available on Sunday at Arizona.

Bush limped off the field just before halftime against the Jets and clearly was in pain. He rode a stationary bike on the sideline in the second half to keep the knee loose.

Bush’s lone public comment Monday came on Twitter, where he wrote, ‘‘Received some great news today! Praise the Lord!’’

Raider out of hospital

Raiders wideout Darrius Heyward-Bey was released from the hospital a day after being knocked out by a helmet-to-helmet hit and is expected to make a full recovery.

Heyward-Bey suffered a concussion and a strained neck on the scary hit from Pittsburgh safety Ryan Mundy that stopped Sunday’s game for more than 10 minutes as the fourth-year pro was carted off the field. Mundy said after the game that he did not intentionally lead with his helmet, and Oakland coach Dennis Allen said he did not believe there was any intent to injure on Mundy’s part.

“It’s the unfortunate things that happen in this game but we move on from it,’’ Allen said.

Marshall takes issue

Bears receiver Brandon Marshall criticized former NFL star Warren Sapp for calling him a ‘‘retard’’ in a recent radio interview.

That struck a chord with Marshall, who has acknowledged receiving treatment for borderline personality disorder and anger management, and he fired back Monday in an online video, referring, among other things, to Sapp’s bankruptcy filing and divorce.

Marshall later posted on Twitter that he received an e-mail from Sapp asking ‘‘where and when’’ and that he assumed he was being challenged to a fight.

Vick taking a licking