In NASCAR Cup Series practice at Chicago, things were looking promising for William Byron. He was faster than Shane van Gisbergen, setting the pace in the first practice group. He lapped the street circuit in 1:31.008s, over three tenths quicker than SVG.
However, after completing eight laps, the No. 24 Hendrick Motorsports Chevrolet returned to the track for the closing moments of the session. That ended up being a mistake, as Byron lost it on entry into Turn 10. The car slid out and hit the wall, breaking the left-rear toe-link and damaging the side of the car. He crab-walked the car back to the pits, but the damage was done.
