The robbery occurred at about 11:30 p.m. Saturday. The victim was struck from behind by a male suspect and had his property taken, police said.
Police said a female suspect also sprayed another victim with mace.
One male suspect is described by police as African-American with a blue and white bandana, white shirt and gray pants. A second male suspect is described by police as African-American with a gray shirt, dark jeans with black hair and blonde tips.
The female suspect is described by police as African-American with long black hair, blue jean jacket and black shorts. All three suspects are between 17-20 years old, police said.
Anyone with information is asked to contact Area Central detectives at (312)-747-8380.