William Byron was third (153.951), followed by Justin Allgaier (153.616), Ty Dillon (153.472), Brennan Poole (153.420), Tyler Reddick (153.387), Daniel Suarez (153.094), Matt Tifft (152.990) and Elliott Sadler (152.918).
There was only one incident in the session, a red flag stoppage for what appeared to be a piece of lead or tungsten weight from the No. 21 car of Daniel Hemric.
The team called Hemric to the garage where it was due to be examined by NASCAR officials.
There will be one other Xfinity practice session this afternoon from 2:30 to 3:25 p.m. ET.
Click here for the full practice session rundown.