#33-Paul Menard was fastest during opening practice at Michigan International Speedway with a speed of 189.668mph. #42-Kyle Larson was second, followed by: #22-Joey Logano, #9-Chase Elliott, #2-Brian Scott, #554-Kyle Busch, #62-Brendan Gaughan, #88-Dale Earnhardt, Jr., #6-Trevor Bayne, and #60-Chris Buescher. 41 drivers practiced during the session. See complete results on the Michigan practice 1 speeds page (pdf).
