Washington highlighted the first half with a 92-yard touchdown run to cap a 99-yard drive for a 24-0 lead. The Bulls defense forced a three-and-out, and Washington scored again from 1-yard out to make it 31-0 at the break.
Washington finished with 155 yards on 16 carries and Cook added 89 yards on 17 carries as Buffalo (3-3, 3-0 Mid-American Conference) totaled 280 yards on the ground.
The Buffalo defense also had a 90-plus yard score when James Patterson scooped up a fumble near the end zone and raced the other way for a 38-point lead.
Matt McDonald was 21 of 42 for 281 yards with one touchdown and one interception for Bowling Green (2-4, 1-1).
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