Huge move in traffic!!!! Jack Aitken in the Whelen Cadillac to the lead! TireRack .com Battle On The Bricks 🟢: Sunday, September 20 | 3:00PM ET 📺: NBC, Peacock 🌍: IMSA YouTube Live, IMSA .tv 📻: IMSA Radio #IMSA #IMS #Michelin #WeatherTech #NBCSports