The man was taken to Illinois Masonic Medical Center in good condition, police said.
No citations were issued.
The boy was treated and is in good condition, police said.
Chicago police are asking for help finding Felix Lopez, 14, who was last seen on Thursday.
A man has been charged in federal court as the alleged getaway driver in a Des Plaines bank robbery earlier this week that led to a police chase to Chicago and shootout that wounded a Chicago police officer and a bystander.
A suspected bank robber shot a Chicago police officer in the head, badly wounding him, before another officer killed the suspect in a shootout in which a teenage bystander was wounded.
A 16-year-old girl who has been missing from Old Irving Park for more than two months has been located.