PITTSBURGH (AP) -Philadelphia Eagles running back Brian Westbrook has improved significantly since Sunday when he sustained a second concussion in a three-week span, doctors said Wednesday.

Westbrook was evaluated Wednesday at the University of Pittsburgh Medical Center and underwent a battery of neuro-cognitive tests, according to a statement released jointly by the Eagles and the hospital. He also had a comprehensive physical and neurological exam that showed favorable results.

Dr. Joseph Maroon and Dr. Michael Collins, who are sports concussion specialists, said they plan to repeat the tests in two to three weeks.

Westbrook sustained a concussion on Oct. 26 in a game against Washington. He sat out for two weeks and then was reinjured Sunday during his return to the lineup at San Diego.

Westbrook won't play this Sunday at Chicago against the Bears, and it's unknown if he'll return at all this season.

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