#99-Alex Bowman was fastest during opening practice at Kansas Speedway with a speed of 177.223 mph. #7-Regan Smith was second, followed by: #16-Chris Buescher, #12-Sam Hornish, Jr., #3-Austin Dillon, #18-Matt Kenseth, #31-Justin Allgaier, #54-Kyle Busch, #32-Kyle Larson, and #33-Paul Menard. 42 drivers practiced during the session. See complete results on the Kansas practice 1 speeds page (pdf) .
