Ryan Tannehill's return from his knee injury is uncertain, but an MRI showed no structural damage.

The Miami Dolphins will start Matt Moore until Tannehill returns.

"The majority of my career, I've been a backup," Moore said. "I just prepare and know that the opportunity can come at any time. When you get in there, manage the game, don't turn the ball over, but at the same time take your shots and make big plays. That's just how I approach it."

The Dallas Cowboys have expressed optimism that DeMarco Murray is closer to returning from his sprained foot.

The Cowboys may give Murray one extra week of rest.

"We’ll just have to see," Jason Garrett said Monday afternoon. "It seems like he’s moving around a little bit better. Again, that’s an injury you have to be patient with. We don’t want to rush him back then take any backward steps. We’ll see how he is day-by-day this week." 

Alex Smith has thrown four interceptions with a 55.4 passer rating since injuring his middle finger on his throwing hand on Oct. 14.

Smith and the San Francisco 49ers had extra rest following their Thursday win against the Seahawks.

Jim Harbaugh is seeing a difference in Smith's throwing in practice.

“Yeah, it was a good week throwing the ball, very good this week,” Harbaugh said. “I think he feels very good physically. Confident going into the game and ready to roll.”

The pain in Frank Gore's bruised ribs has subsided significantly since a week ago Thursday, as the San Francisco 49ers have him listed as "probable" on the injury report.

“It’s lessened a lot,” Gore said. “A lot. I’m sleeping good.”

Gore was a full participant in practice this week.

The Dallas Cowboys will be without DeMarco Murray on Sunday against the Giants.

Murray hasn't practiced since injuring his foot against the Ravens on Oct. 14.

The Cowboys hope to have Murray back for Week 9 against the Falcons.

Murray rushed for 131 yards in Week 1 against the Giants.

Felix Jones will start for Dallas as Murray's replacement.

Aaron Hernandez didn't travel with the New England Patriots to London for their Week 8 game against the Rams.

Hernandez played the last two weeks with a high ankle sprain, but didn't appear 100 percent healthy.

The Patriots have a bye following their trip to London.

Greg Jennings will undergo surgery on Tuesday to repair a torn abdominal muscle that has kept him out for most of the season. 

The surgery is expected to force Jennings to miss approximately three weeks.

"Honestly, I'm over being bummed about it. That took place three, four weeks ago," Jennings said Thursday. "It is what it is. I need to take care of it to 100 percent, and that's the process I'm taking."

Pierre Garcon has a torn ligament on the bottom of his right foot and he's hoping to avoid surgery.

Garcon has missed four of the Washington Redskins' past six games as a "plantar plate tear" near his second toe. 

Garcon visited a foot specialist Wednesday.

Trent Richardson is feeling better and wants to continue playing despite a rib injury.

“If you’re ready to get hit back, that’s on you,” said Richardson.

Some believe Richardson should sit this week in order to give himself two full weeks since the Browns have a bye next week.

“I’m not going to sit down,” said Richardson. “That’s just never been in me to sit down. I only sat a game when I had to and I couldn’t go out there. I’m going to go out there and see what I can do. If I can’t finish the game, [backup running back] Montario [Hardesty is] going to be there and he’s going to do what he [does] every week when I’m not in the game.”

Greg Jennings will visit a specialist as he tries to return from a groin injury.

Jennings has missed four games with his injury, but the Green Bay Packers have a 3-1 record in those games.

Randall Cobb has emerged in the absence of Jennings.

“The plan with Greg just from Day 1 was to try to get as far into the week because with his type of injury, the fatigue, going through the testing and him maxing it out,” Packers coach Mike McCarthy said on Monday. “The fatigue part of it we felt sending him out for a bunch of practice was probably not in his best interest for the week he comes back.”