#54-Kyle Busch was fastest during opening practice at Kentucky Speedway with a speed of 174.729mph. #12-Ryan Blaney was second, followed by:#2-Brian Scott, #33-Paul Menard, #98-Corey LaJoie, #42-Kyle Larson, #5-Kevin Harvick, #3-Ty Dillon, #62-Brendan Gaughan, and #22-Brad Keselowski. All 44 drivers practiced during the session. See complete results on the Kentucky practice 1 speeds page (pdf).
