He had a blood clot deep in his brain.
Sumner collapsed on the field while practicing with the Simi Valley Vikings Youth Football Team last Thursday.
He died the next day at a hospital.
It's unclear when or how he sustained the head injury.
He had a blood clot deep in his brain.
Sumner collapsed on the field while practicing with the Simi Valley Vikings Youth Football Team last Thursday.
He died the next day at a hospital.
It's unclear when or how he sustained the head injury.