William Byron at Chicagoland
William Byron has made 3 NASCAR Cup Series starts at Chicagoland since 2018, with 0 wins, 2 top 10s and an average finish of 10.7.
Totals at Chicagoland by series
| Series | Starts | Wins | Top 5 | Top 10 | Laps led | Avg finish | Avg start | Best finish |
|---|---|---|---|---|---|---|---|---|
| Cup Series | 3 | 0 | 1 | 2 | 103 | 10.7 | 9.7 | 4 |
| Xfinity Series | 1 | 0 | 0 | 0 | 0 | 33 | 8 | 33 |
| Truck Series | 1 | 0 | 0 | 0 | 0 | 30 | 9 | 30 |
Every start at Chicagoland
| Date | Race | Series | Start | Finish | Laps led | Status |
|---|---|---|---|---|---|---|
| July 5, 2026 | 2026 eero 400 | Cup Series | 10 | 4 | 94 | Running |
| June 30, 2019 | 2019 Camping World 400 | Cup Series | 11 | 8 | 9 | Running |
| July 1, 2018 | 2018 Overton’s 400 | Cup Series | 8 | 20 | 0 | Running |
| September 16, 2017 | 2017 TheHouse.com 300 | Xfinity Series | 8 | 33 | 0 | Mechanical |
| September 16, 2016 | 2016 American Ethanol E15 225 | Truck Series | 9 | 30 | 0 | Crash |