Police said Oscar Montes and another man were seen on a police surveillance camera striking a man seated in a car late Friday in the 2300 block of South Washtenaw Avenue.
The two-time IndyCar Series champion slingshotted around defending champion Marcus Ericsson on a late restart and held him off through the last two turns.
Chicago historically records surges of shootings on Memorial Day weekend with the unofficial start of summer.
Just before noon, a woman and three men were in the 7900 block of South Ashland Avenue when a vehicle approached and someone inside opened fire, Chicago police said.
Eloy Jimenez doubles in two runs, scores go-ahead run in first game back from appendectomy