He was found unresponsive about 3:55 a.m. in front of a home in the 9100 block of South Emerald Avenue, Chicago police said.
He was transported to Christ Medical Center in Oak Lawn where he was pronounced dead, police said.
The Cook County medical examiner’s office identified him as Lesean Long, of West Chatham.
There were no witnesses to the shooting, according to police.
Area Two detectives are investigating the homicide.