William Byron at COTA
William Byron has made 6 NASCAR Cup Series starts at COTA since 2021, with 1 win, 3 top 10s and an average finish of 7.3.
Totals at COTA by series
| Series | Starts | Wins | Top 5 | Top 10 | Laps led | Avg finish | Avg start | Best finish |
|---|---|---|---|---|---|---|---|---|
| Cup Series | 6 | 1 | 3 | 3 | 72 | 7.3 | 9.3 | 1 |
| Xfinity Series | 2 | 0 | 2 | 2 | 4 | 2 | 6 | 2 |
Every start at COTA
| Date | Race | Series | Start | Finish | Laps led | Status |
|---|---|---|---|---|---|---|
| March 1, 2026 | 2026 DuraMAX Texas Grand Prix Powered by RelaDyne | Cup Series | 10 | 13 | 1 | Running |
| March 2, 2025 | 2025 EchoPark Automotive Grand Prix | Cup Series | 15 | 2 | 1 | Running |
| March 1, 2025 | 2025 Focused Health 250 | Xfinity Series | 3 | 2 | 3 | Running |
| March 24, 2024 | 2024 EchoPark Automotive Grand Prix | Cup Series | 1 | 1 | 42 | Running |
| March 26, 2023 | 2023 EchoPark Automotive Grand Prix | Cup Series | 1 | 5 | 28 | Running |
| March 25, 2023 | 2023 Pit Boss 250 presented by USA Today | Xfinity Series | 9 | 2 | 1 | Running |
| March 27, 2022 | 2022 EchoPark Automotive Grand Prix | Cup Series | 24 | 12 | 0 | Running |
| May 23, 2021 | 2021 EchoPark Texas Grand Prix | Cup Series | 5 | 11 | 0 | Running |