#9-William Byron was fastest during opening practice at Homestead Miami Speedway with a speed of 171.411mph. #24-Kyle Larson was second, followed by #21-Johnny Sauter, #00-Cole Custer, #88-Matt Crafton, #29-Tyler Reddick, #33-Ben Kennedy, #41-Ben Rhodes, #19-Daniel Hemric, and #23-Spencer Gallagher.
Sauter, Crafton are among four drivers competing for the championship in the season-finale. #17-Timopthy Peters was 11th and #4-Christopher Bell, the remaining Chase driver, was 14th during the session.
34 drivers practiced during the session.
See complete results on the Homestead practice 1 speeds page (pdf).
