#51-Kyle Busch was fastest during the opening practice at Michigan International Speedway with a speed of 186.485 mph. #20-Austin Dillon was second, followed by #54-Darrell Wallace, Jr., ##17-Timothy Peters, #05-Travis Kvapil, #29-Ryan Blaney, #31-Ben Kennedy, #77-German Quiroga, and #19-Joey Logano. 28 drivers practiced during the session. See complete results on the Pocono practice 1 speeds page (pdf).
