A 13-year-old New Jersey football player who collapsed during practice Monday and later died had an undetected heart condition, WNBC is reporting.
The preliminary results of an autopsy on Sean Fisher revealed the heart condition, according to the report.
Fisher's death was the first of two youth football-related deaths this week in New Jersey.
Douglas Morales, 17, died Tuesday night at Hackensack Medical Center of a subdural hematoma, or excessive bleeding in the brain. Morales was running a drill last Friday when he was tackled, his helmet striking the defender's shoulder pad.