A chuva cancelou o treino classificatório para a Pennzoil 400, no Las Vegas Motor Speedway, segunda etapa da NASCAR Cup Series. Com isso o grid foi definido pela segundo as regras da categoria, e Kyle Busch (Joe Gibbs Racing Toyota) alinha na pole.
Clint Boyer (Stewart-Haas Racing Ford) completa a primeira fila. Aric Almirola ((Stewart-Haas Racing Ford) alinha em terceiro, seguido por Kevin Harvick ((Stewart-Haas Racing Ford).
Matt di Benedetto (Wood Brothers Racing Ford) e Ross Chastain (Roush Fenway Racing Ford), substitute do acidentado Ryan Newman, fecham os seis primeiros.
Grid:
1 18 Kyle Busch Joe Gibbs Racing Toyota
2 19 Martin Truex Jr. Joe Gibbs Racing Toyota
3 4 Kevin Harvick Stewart-Haas Racing Ford
4 11 Denny Hamlin Joe Gibbs Racing Toyota
5 22 Joey Logano Team Penske Ford
6 42 Kyle Larson Chip Ganassi Racing Chevrolet
7 12 Ryan Blaney Team Penske Ford
8 2 Brad Keselowski Team Penske Ford
9 14 Clint Bowyer Stewart-Haas Racing Ford
10 9 Chase Elliott Hendrick Motorsports Chevrolet
11 24 William Byron Hendrick Motorsports Chevrolet
12 88 Alex Bowman Hendrick Motorsports Chevrolet
13 1 Kurt Busch Chip Ganassi Racing Chevrolet
14 10 Aric Almirola Stewart-Haas Racing Ford
15 6 Ross Chastain (i) Roush Fenway Racing Ford
16 20 Erik Jones Joe Gibbs Racing Toyota
17 41 Cole Custer (R) Stewart-Haas Racing Ford
18 48 Jimmie Johnson Hendrick Motorsports Chevrolet
19 21 Matt DiBenedetto Wood Brothers Racing Ford
20 37 Ryan Preece JTG Daugherty Racing Chevrolet
21 3 Austin Dillon Richard Childress Racing Chevrolet
22 95 Christopher Bell (R) Leavine Family Racing Toyota
23 17 Chris Buescher Roush Fenway Racing Ford
24 13 Ty Dillon Germain Racing Chevrolet
25 8 Tyler Reddick (R) Richard Childress Racing Chevrolet
26 47 Ricky Stenhouse Jr. JTG Daugherty Racing Chevrolet
27 43 Bubba Wallace Richard Petty Motorsports Chevrolet
28 34 Michael McDowell Front Row Motorsports Ford
29 38 John Hunter Nemechek (R) Front Row Motorsports Ford
30 32 Corey LaJoie Go Fas Racing Ford
31 53 Joey Gase (i) Rick Ware Racing Ford
32 00 Quin Houff (R) StarCom Racing Chevrolet
33 15 Brennan Poole (R) Premium Motorsports Chevrolet
34 51 Garrett Smithley Petty Ware Racing Chevrolet
35 96 Daniel Suárez Gaunt Brothers Racing Toyota
36 77 Reed Sorenson Spire Motorsports Chevrolet
37 52 J. J. Yeley Rick Ware Racing Ford
38 66 Timmy Hill (i) MBM Motorsports Toyota