SEATTLE (AP) - Washington safety Darin Harris was placed on a stretcher and taken off the field in an ambulance early in the fourth quarter on Saturday of the Huskies 28-27 loss to No. 15 BYU.

Harris was injured when his head hit the field trying to chase down BYU tight end Dennis Pitta, who had just caught a 22-yard pass near the BYU sideline. Harris' hit the field face first as he fell over Pitta, jarring his head backward. BYU trainers immediately came to Harris' aid as Washington medical personnel raced across the field.

Harris was put onto a backboard and then placed on the stretcher. He appeared to be moving his arms as he was placed in the ambulance.

Coach Tyrone Willingham said after the game Harris probably has a concussion. School officials said they are unsure of the severity of the concussion, but that all tests at Harborview Medical Center came back negative for any spinal injuries and Harris was being kept overnight for observation.