Brady Quinn of Kansas City Chiefs: I played with concussion

KANSAS CITY, Mo. -- Kansas City Chiefs quarterback Brady Quinn says he tried to play through a head injury sustained two weeks ago against Oakland, and admitted "that's my fault for not being smart about it."

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Quinn was speaking Wednesday for the first time since sustaining the injury Oct. 28.

He remembers taking a knee to the back of the helmet during a scramble early in the game, but he never saw the Raiders' Rolando McClain when he got sacked on the next play, and Quinn recalled having "tunnel vision" when he threw an ensuing interception.

Quinn also acknowledged sustaining a concussion in a preseason game against Green Bay. That one cleared up quickly, he said, but the latest concussion has been "lingering more."

Quinn already has been ruled out for the Chiefs' game Monday night at the Pittsburgh Steelers. It will be the second straight game he's missed since becoming the starting quarterback.

Copyright 2012 by The Associated Press