The teen called his mother from Cleveland High School to tell her he was sick and coming home around midday, according to the affidavit.
On the way home, he stopped at the basketball court at South Holly Park Drive and South Othello Street and got out of his car to pee in the bushes, reports indicate.
The teen told police he then heard an engine accelerate behind him. He saw a black four-door car. Someone fired a gun from the rear left window two or three times and hit his left leg.
He reportedly did not see who shot him or which way the vehicle left. He drove home, here his brother called 911.
Police arrived to find the teen with a bullet wound in his lower left leg. He was taken to Harborview Medical Center.
Detectives continue to investigate the shooting.