Former college soccer star Chase Stegall's cause of death has been revealed ... officials say he passed away due to Sudden Unexpected Death in Epilepsy.
The Cook County Medical Examiner announced the ruling this week ... classifying the manner of death as "natural."
Stegall -- a DePaul University footballer who was the son of former NFL wide receiver Milton Stegall -- died unexpectedly in his dorm room back in early June.