RELATED: Practice 1 results
The No. 13 of Cameron Hayley topped practice on Thursday at Phoenix International Raceway, posting a fastest lap of 137.447 mph.
Next was the No. 4 of Erik Jones, the current NASCAR Camping World Truck Series points leader who had a quickest lap of 137.007 mph.
Rounding out the top three was Brandon Jones, who circled the 1-mile track in his No. 33 Chevrolet with a quick lap of 136.214 mph.
William Byron, who is making his series debut this weekend at Phoenix, finished fourth-fastest (136.065 mph) in his No. 9 Toyota.
The No. 88 Toyota of two-time series champ Matt Crafton (136.039 mph) and the No. 51 Toyota of Daniel Suarez (135.967 mph) were fifth and sixth, respectively.
On-track action picks back up for the series on Friday for the Keystone Light Qualifying at 12:45 p.m. ET. (FS1).