Running back Tra Carson, who was poised to become Kenjon Barner's backup in 2012, has decided to transfer from Oregon.

A team source confirmed Carson's decision Saturday. A UO spokesman was unable to verify the transfer.

Carson, a native of Texarkana, Texas, ran 45 times for 254 yards and a touchdown in 10 games in 2011, his freshman season. At 6-foot-1 and 227 pounds, Carson's departure leaves a physical void in the Ducks' backfield.

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