Washington Redskins rookie quarterback Robert Griffin III was knocked out of Sunday's game with a mild concussion, coach Mike Shanahan said.
Griffin III was hit hard by Falcons linebacker Sean Weatherspoon at the end of a scramble to the right side on which he lost two yards with 6:22 remaining in the third quarter. Griffin III was down for a moment but walked off the field under his own power before heading to the locker room.
Griffin III didn't know what the score was or what quarter the game was in when he was taken to the locker room, Shanahan said.
Griffin was relieved by rookie Kurt Cousins, who threw a 77-yard touchdown pass to Santana Moss but was intercepted late in the fourth quarter to curb a comeback bid.
Griffin will be re-evaluated on Monday to determine his status.
--The NFL replacement referee who signaled a touchdown to end the controversial Green Bay Packers-Seattle Seahawks game two weeks ago stood by his call on Sunday.
Lance Easley said during an appearance on "NFL Today" that he made the correct ruling, even after looking at the replay.
"No, not a doubt," Easley said. "Both players had possession at that point. They were wrapped around it like a meatball and their arms were like spaghetti."
The touchdown gave the Seahawks a Monday night win on a play where it appeared that Packers defensive back M.D. Jennings had the caught the ball in midair and landed in a pile of players with two arms wrapped around the football.
---The NFL is investigating why the Buffalo Bills have yet to list Mario Williams on their injury list, despite the fact he has been vocal about a wrist injury, ESPN reported Sunday.
Williams, who was a celebrated free-agent signing this off-season by the Bills, has been complaining about the injury all season, which is why the NFL is looking into the matter, league sources told ESPN.
Williams has not missed a practice and has started all four games. However, he has been particularly vocal about his wrist injury to the media the past few weeks.
---Carolina Panthers cornerback Chris Gamble, one of the team's top defenders, was doubtful for Sunday's game against Seattle, so the Carolina Panthers signed cornerback Ron Parker off the practice squad, according to the Charlotte Observer.
Parker was signed to the practice squad in September The second-year pro played five games last season, two for Seattle and three for Oakland.
Carolina also placed guard Mike Pollak on injured reserve with a stinger that has suffered during the Week 2 game against New Orleans.
---Running back Ben Tate returned to practice Saturday for the Houston Texans. However, he remained questionable with a toe injury for Monday night's game against the New York Jets.
--New England tight end Rob Gronkowski, who has started all four games for the Patriots this season, is playing through significant pain, ESPNBoston.com reported Sunday.
Gronkowski was listed on the latest injury report with a hip injury, but ESPNBoston.com reported he also is suffering from back problems. He received limited snaps this week during practice.
He caught five passes for 104 yards last week against the Buffalo Bills.
---The Baltimore Ravens are aiming for linebacker Terrell Suggs to return Oct. 21 against the Houston Texans, ESPN reported Sunday.
However, ESPN reported Ravens coach John Harbaugh may take advantage of the team's Oct. 28 bye week and save Suggs to return on Nov. 4.
Suggs said he injured his Achilles in May doing a fitness test, denying ESPN reports and witness accounts that he was playing a pickup basketball game at the time. According to Suggs, the instances were separate.
--Kansas City Chiefs quarterback Matt Cassel left Sunday's game in the fourth quarter with an undisclosed injury.
Cassel, who has been under fire in Kansas City because of turnovers and inconsistent play, earlier fumbled away the ball at the Baltimore Ravens' 1-yard line and left the game with the Chiefs trailing 9-3 amidst boos and chants of "Brady, Brady."
With Quinn at the helm, the Chiefs finished the drive with a field goal to trim the Ravens' lead to 9-6 with 5:44 to play in the game.
--Strong safety Troy Polamalu left the Pittsburgh Steelers' home game against the Philadelphia Eagles in the second quarter Sunday when his right calf injury was aggravated.
Polamalu hopped off the field on one leg, and did not return. He had missed the previous two games before last week's bye with the same injury.
Outside linebacker Lamarr Woodley left with a hamstring injury and is questionable to return.
--Green Bay Packers running back Cedric Benson was carted off the field at Lucas Oil Stadium in Indianapolis with a foot injury. Defensive tackle B.J. Raji also left on a cart in the first half with a left ankle injury.
With No. 2 running back James Starks inactive, the Packers were left with fullback John Kuhn and Alex Green as tailback options without Benson.
---Offensive tackle Tony Hills was elevated from the practice squad by the Indianapolis Colts, who waived wide receiver Kris Adams.
Hills, 6-5, 304 pounds, is a fifth-year veteran who began his career with the Pittsburgh Steelers before playing for the Denver Broncos in 2011. He joined the Colts' practice squad Sept. 18.
---Defensive back Neiko Thorpe was elevated by the Kansas City Chiefs from the practice squad and center Bryan Mattison was released.
Thorpe signed with the Chiefs as an undrafted rookie out of Auburn this year, and joined the practice squad after not making the 53-man roster to open the season.
Mattison has been active for one game this season.
---Detroit Lions running back Jahvid Best, who has been on the physically unable to perform list since last October, will undergo tests this week to determine if he can practice again, ESPN reported Sunday.
Best suffered a concussion almost a year ago and has been having post-concussion symptoms that have kept him off the field.
ESPN said the Lions' are unsure if the multiple doctors will give a consensus approval to let him play again. The hope to have him back Oct. 22 for a Monday night game against the Chicago Bears.