HOUSTON — An autopsy determined a high school football player from the Houston area who collapsed during a game and later died had a rare congenital heart problem.

A funeral will be held Saturday in Houston for 17-year-old Chase Lightfoot. He was a defensive tackle for Shadow Creek High School in the Alvin Independent School District.

Officials say the teen collapsed on the field last Friday during a game against St. Mary’s Hall in San Antonio. Lightfoot was transported to a hospital, where he died early Saturday.

The Bexar (bayr) County medical examiner determine the teen’s death was caused by an aberrant coronary artery. It’s a defect of a vessel that carries blood to the heart.

Shadow Creek won the game 27-14.