Greg Laybourn, a senior from Portland and former walk-on, racked up a game-high 12 tackles including a career-best 10 solo stops in Oregon State's 34-13 road win at Washington.
Laybourn is the Pac-10's leading tackler, averaging 8.86 per game.
The award marks the second time this season Laybourn has been recognized by the Pac-10 this season. He also earned defensive player of the week honors following Oregon State's upset of then-No. 1 USC.
Laybourn began his college career at Northern Arizona, playing one year for the Lumberjacks. He came to Oregon State as a baseball player on partial scholarship and played outfield for the Beavs as a platoon player in 2005-06.
In the spring session before the '06 football season, he decided to walk-on and because of the near impossible demands of trying to play two sports at the college level, has placed his focus out on the gridiron ever since. He eventually earned a full scholie.
Laybourn was the Beavs' sixth leading tackler last year despite starting only two games on a veteran-laden defense.
James Rodgers was also nominated for offensive player of the week, with the award there going to Keola Antolin of Arizona who rushed for 149 yards and logged 237 all-purpose hashes.
Laybourn Pac-10 Defensive Player of Week
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