The incident happened just before 5 p.m. Sunday at 87th Street and Denker Avenue, according to the Los Angeles Police Department.
Investigators say the victim was fatally shot about seven times by someone in a dark SUV. He was taken to the hospital but did not survive.
Though he hasn't been officially identified, Mylik Birdsong's mother told Eyewitness News that her son was the victim. He was scheduled to fight on Oct. 26.
No arrests have been made.
Additional details about the shooting were not available.