SEATTLE – A Washington school district has revealed that a football player who died following a head injury had suffered a concussion before.

KCPQ-TV reports that Highline School District Superintendent Susan Enfield said Thursday morning that Evergreen High School football player Kenney Bui had a concussion several weeks before being injured at last Friday’s game.

She says he was cleared by a doctor to return to the field.

The 17-year-old died Monday. He had collapsed during a last week’s football game against Highline High School.

The King County Medical Examiner’s Office says Bui died from blunt-force trauma to the head.

Highline Public Schools spokeswoman Catherine Carbone Rogers says Bui received surgery at a Seattle hospital and was listed in critical condition Sunday.

Bui was a wide receiver and defensive back.