Jake Locker re-injured his left should during the Tennessee Titans' 38-14 loss to the Texans in Week 4.

Locker was sacked by Glover Quin and grimmaced in pain as he hit the turf and lost the football.

Locker will have an MRI on the shoulder on Monday.

“It is sore, we just don’t know to what level,” Munchak said. “We need to decide what happened. And then we’ll make a decision on what’s best for the player. We’ll evaluate that when we get more information tomorrow.”

Locker suffered a separated left shoulder in the season opener against the Patriots.

Fred Jackson and C.J. Spiller will both be active for the Buffalo Bills against the Patriots in Week 4.

Jackson injured his knee in Week 1 and recovered more quickly than expected.

Spiller injured his shoulder last week.

Jackson and Spiller are expected to split carries.

Hakeem Nicks will not play on Sunday for the New York Giants against the Eagles.

Nicks developed swelling in his left knee after practice on Thursday.

With Nicks out, either Ramses Barden or Domenik Hixon will start.

The Chargers signed kicker Nick Novak on Friday.

Nate Kaeding has an apparent groin injury and is listed questionable.

Kaeding, who'd gone 7-for-7 on field goals, hadn't been on an injury report this season.

"He was sore when he started kicking today, and wasn’t able to continue," coach Norv Turner said.

Rob Gronkowski had “limited participation” in Friday's practice and could miss Sunday's game against the Bills with his hip injury.

“I’m always going with what the game plan gives me,” Gronkowski said. “You never know what kind of situations you’re going to be in during the game, how the game is going to work out. Whatever the assignment is, whatever I’m asked to do, if it’s going out and catching the ball, if it’s staying in and blocking, if it’s run blocking, whatever it is, whatever I’m asked to do, just got to go out and perform it to my best ability that play.”

But ESPN's Adam Schefter reports that Gronkowski is likely to play.

Terrell Suggs is now expected to return earlier than once thought as he recovers from his Achilles tendon injury.

Suggs, who was the 2011 Defensive Player of the Year, would be eligible to return as early as Week 7.

"He has his target date,” Baltimore Ravens' head coach John Harbaugh said, without sharing the specific date. "He is doing well. The main thing we want to do now is make sure there is no setback, and he continues to get in shape and continues to get stronger.”

Suggs previously said that he could be back in October and no later than November.

"Football shape will be a factor,” Harbaugh said. "As soon as he gets on the field, it’s not like he is going to be back to Defensive Player of the Year form. We need to all understand that. Just give him a little space and let him kind of grow into this thing.”

Austin Collie is out for the remainder of the 2012 season with a knee injury.

Collie's injury was sustained in his first game back from multiple concussions.

Reggie Bush exited the Miami Dolphins' Week 3 loss to the Jets with a knee injury.

Bush underwent an MRI, which showed to structural damage.

Bush could play in Week 4 against the Cardinals.

Darrelle Revis has a torn ACL and will miss the remainder of the 2012 NFL season.

Revis will need surgery on the injury that was sustained in the Jets' Week 3 win at the Dolphins.

Revis is almost universally considered the NFL's best cornerback.

The Jets will start Kyle Wilson, a former first round pick at cornerback opposite Antonio Cromartie.

Matthew Stafford is undergoing an MRI on his strained right leg muscle.

Stafford aggravated the injury in Week 3's loss to the Titans during an interception.

The Lions have a bye in Week 5, which could give Stafford extended rest while only missing one game.