A teammate said Washington quarterback Robert Griffin III was doing well Saturday after leaving Thursday's preseason game against the Detroit Lions because of a concussion.

"Robert's fine," Washington tight end Je'Ron Hamm said on a conference call as the Redskins enjoyed a second straight off day. "He got a little banged up. I [don't] like to see any of my teammates down there on the ground, [but] I'm glad to know that he's going to be all right."

Griffin, who is expected to be Washington's opening day starter for a fourth consecutive season, was injured when former Vikings defensive end Corey Wootton landed on him while trying to recover his fumble in the second quarter in a 21-17 Redskins victory.

It remains unclear if Griffin will play on Aug. 29 at Baltimore, the next-to-last game on Washington's preseason schedule. Since NFL teams generally rest their starters in preseason finales, if Griffin is held out against the Ravens, the hope is he would be ready for the Sept. 13 season opener against Miami.

•Redskins linebacker and special teams captain Adam Hayward was placed on injured reserve Saturday after tearing the anterior cruciate ligament in his right knee against Detroit. Hayward's absence could open a spot for undrafted rookie Houston Bates, who recorded his third sack in two games against the Lions. Bates played defensive end afor Illinois and Louisiana Tech.

Etc.

•The Lions signed former Central Michigan tight end Deon Butler, who was with the Lions for rookie minicamp in May. He will take the place of Jordan Thompson, who's expected to go on injured reserve after leaving Thursday's game because of a knee injury. The Lions already have lost tight ends David Ausberry, who broke a finger earlier this month and was released from injured reserve with an injury settlement last week.

•Running back Fred Jackson and receivers Sammy Watkins and Robert Woods returned to the Buffalo Bills' practice field, coach Rex Ryan said. Jackson's return from a hamstring injury is critical at a position that has been decimated by injuries. The Bills are without leading rusher LeSean McCoy (hamstring), rookie Karlos Williams (undisclosed) and fourth-year pro Bryce Brown (hamstring). Jackson is second on Buffalo's depth chart behind McCoy.