#20-Erik Jones was quickest in final practice at Chicago with a speed of 173.310mph.
#23-Spencer Gallagher was second, followed by: #18-Daniel Suarez, #00-Cole Custer, #22-Ryan Blaney, #9-William Byron, #42-Kyle Larson, #1-Elliott Sadler, #48-Brennan Poole, and #11-Blake Koch.
39drivers practiced during the session.
See complete results on the Chicago practice 2 speeds page (pdf).
