Packers linebacker Clay Matthews will miss Sunday’s game in Detroit with a hamstring injury suffered Nov. 4 against the Cardinals. He is tied for second in the NFC with nine sacks . . . Matt Cassel will remain the Chiefs starting quarterback because Brady Quinn still has not been cleared to participate in a game following his concussion . . . Cowboys running back DeMarco Murray, who has missed four games with a sprained foot, said there is “a chance” he could play Sunday against the Browns . . . Bears kicker Robbie Gould ripped the surface at Soldier Field, then apologized for it. Gould said he might have to think about re-signing with Chicago when his contract expires after next season. Later, however, the Bears issued a statement from Gould in which he apologized to the grounds crew.