It happened just before 4:30 p.m. on the 6200 block of Wheeler Street in Southwest Philadelphia.
During the gun battle, a stray bullet went through a window and grazed 35-year-old Llyod McPherson.
"It could have killed him. He's real lucky," said McPherson's mother, Denise.
She says he was sitting here on his enclosed porch when gunshots rang out.
"He got up saying he was shot. I'm like, 'How you shot, you're in the damn house? You ain't shot.' When he came in the living room, he fell on the floor and I looked and that's when I seen the blood," Denis called.
The victim was taken to an area hospital in stable condition.
Police believe the bullet was fired from about 300 feet away-detectives located at least 16 bullet casings on the ground.
Two vehicles were found to be struck by gunfire as officers processed the scene.
No arrests have been made.
Anyone with information is asked to call police at 215-686-TIPS.