#3-Austin Dillon was fastest during opening practice at Phoenix International Raceway with a speed of 133.087mph.#54-Kyle Busch was second, followed by: #2-Brian Scott, #32-Kyle Larson, #7-Regan Smith, #5-Jimmie Johnson, #43-Aric Almirola, #31-Justin Allgaier, #18-Matt Kenseth, and #33-Kevin Harvick. 38 drivers practiced during the session. There are only 40 teams at the track so everyone will make the race. See complete results on the Phoenix practice 1 speeds page (pdf) .
