Firekeepers Casino 400 Rescheduled Today at 4:00 PM Posted on June 10, 2019June 10, 2019 by Rick Watts Due to inclement weather at Michigan International Speedway, the “FIREKEEPER’S CASINO 400” Monster Energy NASCAR Cup Series event has been postponed until Monday, June 10th. MRN coverage will begin at 4:oo p.m. CT.