Kevin Harvick followed up his ISM Raceway pole run with the fastest speed in Saturday morning practice.
Harvick’s best lap was 134.710 mph (26.724 sec). The nine-time Phoenix winner topped the board over Kyle Larson, who ran 134.680 mph.
Brad Keselowski (134.479 mph), Kyle Busch (134.273 mph) and Ryan Blaney (134.238 mph) completed the top five.
Chase Elliott (134.038 mph), Austin Dillon (134.988 mph), Jimmie Johnson (133.949 mph), Denny Hamlin (133.914 mph) and Martin Truex Jr. (133.819 mph) were the rest of the top 10.
Playoff drivers outside the top 10 were Clint Bowyer in 11th (133.650 mph), Aric Almirola in 14th (133.437 mph), Kurt Busch 15th (133.432 mph) and Joey Logano 24th (133.038 mph).
The 50-minute session had no major issues. Tanner Berryhill brought out a brief caution when he spun.
Six cars served 15-minute practice holds for being late to pre-qualifying inspection: DJ Kennington, Ty Dillon, JJ Yeley, Jimmie Johnson, Timmy Hill, and Berryhill.
NASCAR also allowed teams to work on restarts at the end of practice with the start/finish line now be positioned in what used to be Turn 2.
Some drivers practiced by themselves, but there were others who lined up with a fellow driver. Kyle Busch and Martin Truex Jr. lined up side-by-side and worked together, as did Chase Elliott and Denny Hamlin. There was also a group of four at one time.
UP NEXT: Final practice at 2 p.m. ET/12 p.m. MT.