Rams running back Steven Jackson has left St. Louis? game against the Washington Redskins to have medical tests after injuring his groin. The team says his return was questionable, according to an Associated Press report.

Michigan quarterback Denard Robinson left the Wolverines' game against Bowling Green after being injured, according to an ESPN.com report. Robinson was hit near the sideline at the end of a 47-yard run Saturday for the Wolverines. He appeared to be having his left knee evaluated on the sideline behind the bench.

Beanie Wells had arthroscopic surgery on his right knee after he was injured in the team's final preseason game, which was kept secret until Friday. Cardinals coach Ken Whisenhunt confirmed Friday that Wells had surgery but said it was not a serious procedure and there was no reason to believe the running back would be out more than on a week-to-week basis. Wells told reporters that the surgery was performed to repair a torn meniscus. The issue was raised after a reporter from CBSSports.com noticed incision marks on Wells' knee.

Darrelle Revis will not play for the Jets on Sunday against the Dolphins, Rex Ryan said after practice Wednesday. "We felt that we might as well let you know now that Revis is not to where he can play," Ryan said of Revis, who aggravated a tight left hamstring in Sunday's win over the Patriots. "He's itching to get back, but it's too risky of a proposition to put him out there," Ryan said.

One source close to the situation told the Post-Gazette that Dennis Dixon has a torn lateral meniscus, which could keep him out 3-5 weeks. Byron Leftwich was signed again by the Steelers on Monday.

Percy Harvin aggravated a right hip injury and said he will have an MRI on Monday. He had five catches for 32 yards.

Matt Moore is expected to start at quarterback for the Panthers on Sunday against the Buccaneers. Moore practiced on Thursday for the second straight day after suffering a concussion in Week 1. "I feel good. That's where we're at," Moore said. "I'm planning and preparing [to start]. If something changes, so be it."

Cardinals running back Beanie Wells went through a limited workout Wednesday and coach Ken Whisenhunt says the team will "really test" his injured knee on Thursday. Wells did not practice all last week and sat out the season opener at St. Louis with a bruised right knee.

Eagles quarterback Kevin Kolb and linebacker Stewart Bradley both failed their concussion tests on Wednesday. Philadelphia coach Andy Reid did say that both players have made progress this week. They both suffered concussions in Sunday's loss to Green Bay. Reid said quarterback Michael Vick will run the offense in practice Wednesday and Thursday and "we'll take Friday as it comes."

49ers wide receiver Ted Ginn Jr. sprained his MCL on Sunday against the Seahawks and will likely miss at least two weeks. Ginn Jr. had one catch for 19 yards before leaving the game with the injury.