KANSAS CITY, Mo. — Brady Quinn waited three years for another chance to be a starter. He wouldn't let a concussion put him back on the sideline.
That's why, the Chiefs quarterback admitted Wednesday, he tried to play through his second concussion of the season. He believes it happened when a defender's knee struck the back of his helmet against the Raiders on Oct. 28.
Quinn remembers having vision problems and being dazed. But he stayed in the game even though he put on the wrong helmet on the sideline between possessions.
Soon after, Quinn said, he didn't see linebacker Rolando McClain before getting sacked by him, had "tunnel vision" and couldn't see the defensive backs when he threw an interception. He left the game after the pick.
"It was the first opportunity for me in a while," said Quinn, speaking for the first time since the injury. "That's my fault for not being smart about it."
Quinn has been ruled out for Monday. Matt Cassel will start for the second straight game.
Quinn, the 22nd overall pick in 2007 and playing for his third team, sustained his first concussion while scrambling against the Packers during the preseason.
GM: Payton will stay
NEW ORLEANS — A day after returning from an eight-game bounty suspension, Saints general manager Mickey Loomis said he's confident Sean Payton will remain as coach.
Loomis wasn't available for comment Tuesday. His first item of business likely involves Payton, whose 2011 contract extension was voided by the league. As a result, Payton, suspended for the season, can become a free agent.
"I absolutely expect Sean to be our coach next year and going forward," Loomis said. "These contract issues will be resolved."
Chargers fined: The league fined San Diego $20,000 because a member of its equipment staff failed to immediately surrender towels when ordered to do so by a game official against Denver on Oct. 15. The league also investigated the towels, which included an adhesive substance but, it said, did not violate any rules.
Ex-Buc claimed: The Dolphins claimed corner Brandon McDonald off waivers from the Bucs. He replaces corner Richard Marshall, who went on injured reserve with a back injury.
Bears: Star corner Charles Tillman might sit Sunday because of the birth of his daughter, who is due this week.
Packers: Linebacker Nick Perry, the 28th overall pick in April, went on injured reserve with a torn ligament in his wrist. He had two sacks in six games.
Titans: Jake Locker will start at quarterback Sunday. He has missed five games after injuring his nonthrowing shoulder Sept. 30 against the Texans.
Vikings: Coach Leslie Frazier said receiver Percy Harvin's ankle injury sustained Sunday is improved. His status has not been determined.