Quinn, too, is done for the season with a finger injury. He has not yet decided whether to have surgery on the right index finger he broke on Nov. 17 at Buffalo.
The injuries to their top two QBs mean the Browns (4-8) will start Ken Dorsey on Sunday against the Tennessee Titans (11-1). Return specialist Joshua Cribbs, who played quarterback at Kent State, will serve as Dorsey's backup unless the Browns can sign a veteran quarterback in the next few days.
"Once Derek came back in we were all confident because we know Derek can play and its frustrating now that we have to change again," guard Eric Steinbach said.
Browns tight end Kellen Winslow will also sit out this week after suffering a high-ankle sprain on Sunday. Winslow will be fitted with a walking boot for 1 week, but it's still too early to determine if he'll play again this season.
* Buffalo quarterback Trent Edwards, who left Sunday's loss to San Francisco because of a groin injury, will have tests to see if he can play this weekend.
If Edwards can't play when the Bills take on Miami in Toronto Sunday, backup J.P. Losman will start.
* Atlanta defensive tackle Grady Jackson and several other players could learn today the results of their appeals to the NFL of suspensions for a positive doping test.
Jackson, Minnesota DTs Kevin Williams and Pat Williams, New Orleans running back Deuce McAllister and defensive linemen Will Smith and Charles Grant, and Houston long snapper Bryan Pittman reportedly tested positive for the diuretic Bumetanide. The drug helps rid the body of excess water and salt but is considered a masking agent for steroids by the NFL. All of those players appealed.
* New England will play Tampa Bay next season at London's Wembley Stadium, the third straight year the NFL will stage a regular-season game in the British capital.
The game will be played Oct. 25. The Bucs will be listed as the home team, giving up a game in Tampa.
* Dallas linebacker DeMarcus Ware and running back Marion Barber were not at practice and are, according to coach Wade Phillips, listed as day-to-day.
Ware has a hyperextended left knee and Barber has a dislocated right pinkie toe. Both were hurt in the Cowboys' 34-9 victory over Seattle on Thanksgiving.
* Tampa Bay expects to have defensive coordinator Monte Kiffin on staff for the remainder of the season. However, neither Kiffin nor the team has said anything to end speculation that he has decided to leave to work for his son, Lane, the new football coach at the University of Tennessee.
Bucs general manager Bruce Allen said he knows how the situation will play out, but would not disclose whether Kiffin is staying.
* Green Bay coach Mike McCarthy said the Packers were going to cut punter Derrick Frost and replace him with another player.
* Cincinnati safety Marvin White, who played most of the Bengals loss to Baltimore Sunday with torn knee ligaments, will miss the rest of the season.
Tests on White's right knee found that he tore the anterior cruciate and medial collateral ligaments in the first half but didn't realize the severity of the injury and stayed in the game.
* Detroit signed Keary Colbert to take the place of Mike Furrey, who was placed on injured reserve with a concussion. *