William Byron NASCAR Stats and Results
William Byron has made 318 NASCAR Cup Series starts since 2018, with 16 wins and 134 top 10s, and averaged 15.9 at the finish in 2026.
Career totals by series
| Series | Starts | Wins | Top 5 | Top 10 | Laps led | Avg finish | First season | Last season |
|---|
| Cup Series | 318 | 16 | 70 | 134 | 4485 | 15.2 | 2018 | 2026 |
| O'Reilly Series | 46 | 5 | 18 | 29 | 434 | 10.2 | 2017 | 2026 |
| Truck Series | 31 | 8 | 15 | 20 | 842 | 10.1 | 2015 | 2025 |
Season by season
| Season | Series | Starts | Wins | Top 5 | Top 10 | Laps led | Avg finish | Avg start | DNF |
|---|
| 2026 | Cup Series | 30 | 0 | 5 | 14 | 176 | 15.9 | 14.8 | 3 |
| 2026 | O'Reilly Series | 3 | 0 | 1 | 2 | 1 | 7.3 | 3.7 | 0 |
| 2025 | Cup Series | 36 | 3 | 11 | 16 | 1330 | 14.5 | 9.9 | 3 |
| 2025 | Xfinity Series | 2 | 1 | 2 | 2 | 74 | 1.5 | 3.5 | 0 |
| 2025 | Truck Series | 2 | 0 | 1 | 1 | 4 | 8 | 12 | 0 |
| 2024 | Cup Series | 36 | 3 | 13 | 21 | 357 | 12.9 | 9.6 | 2 |
| 2024 | Xfinity Series | 4 | 0 | 1 | 1 | 32 | 12.2 | 19.8 | 0 |
| 2023 | Cup Series | 36 | 6 | 15 | 21 | 1017 | 11 | 10.9 | 2 |
| 2023 | Xfinity Series | 1 | 0 | 1 | 1 | 1 | 2 | 9 | 0 |
| 2023 | Truck Series | 3 | 0 | 2 | 2 | 17 | 6 | 8.7 | 0 |
| 2022 | Cup Series | 36 | 2 | 5 | 11 | 746 | 15.6 | 12.5 | 6 |
| 2022 | Xfinity Series | 3 | 0 | 1 | 1 | 64 | 17.7 | 8.7 | 1 |
| 2022 | Truck Series | 1 | 1 | 1 | 1 | 94 | 1 | 32 | 0 |
| 2021 | Cup Series | 36 | 1 | 12 | 20 | 425 | 13.6 | 8.7 | 4 |
| 2021 | Truck Series | 1 | 0 | 0 | 0 | 0 | 36 | 10 | 1 |
| 2020 | Cup Series | 36 | 1 | 4 | 14 | 140 | 16.2 | 14.9 | 4 |
| 2019 | Cup Series | 36 | 0 | 5 | 13 | 233 | 14.9 | 12.4 | 2 |
| 2018 | Cup Series | 36 | 0 | 0 | 4 | 61 | 22.1 | 17.7 | 7 |
| 2017 | Xfinity Series | 33 | 4 | 12 | 22 | 262 | 10.4 | 8.5 | 3 |
| 2016 | Truck Series | 23 | 7 | 11 | 16 | 727 | 9.2 | 5.6 | 2 |
| 2015 | Truck Series | 1 | 0 | 0 | 0 | 0 | 31 | 5 | 1 |
Last 15 races
| Date | Race | Track | Series | Start | Finish | Laps led | Status |
|---|
| September 27, 2026 | 2026 Hollywood Casino 400 | Kansas | Cup Series | 8 | 7 | 0 | Running |
| September 19, 2026 | 2026 Bass Pro Shops Night Race | Bristol | Cup Series | 4 | 9 | 0 | Running |
| September 13, 2026 | 2026 Enjoy Illinois 300 | Gateway (WWT) | Cup Series | 24 | 4 | 0 | Running |
| September 6, 2026 | 2026 Cook Out Southern 500 | Darlington | Cup Series | 20 | 37 | 0 | Engine |
| August 29, 2026 | 2026 Coke Zero Sugar 400 | Daytona | Cup Series | 13 | 22 | 14 | Running |
| August 23, 2026 | 2026 Dollar Tree 301 | New Hampshire | Cup Series | 3 | 30 | 26 | Running |
| August 15, 2026 | 2026 Cook Out 400 | Richmond | Cup Series | 5 | 9 | 0 | Running |
| August 9, 2026 | 2026 Iowa Corn 350 Powered by Ethanol | Iowa | Cup Series | 19 | 9 | 0 | Running |
| July 26, 2026 | 2026 Brickyard 400 presented by PPG | Indianapolis | Cup Series | 21 | 21 | 0 | Running |
| July 19, 2026 | 2026 Window World 450 | North Wilkesboro | Cup Series | 15 | 12 | 0 | Running |
| July 12, 2026 | 2026 Quaker State 400 Available at Walmart | Atlanta | Cup Series | 26 | 16 | 0 | Running |
| July 5, 2026 | 2026 eero 400 | Chicagoland | Cup Series | 10 | 4 | 94 | Running |
| June 28, 2026 | 2026 Toyota / Save Mart 350 | Sonoma | Cup Series | 13 | 12 | 1 | |
| June 21, 2026 | 2026 Anduril 250 | San Diego Street Course | Cup Series | 27 | 32 | 0 | Running |
| June 14, 2026 | 2026 Great American Getaway 400 presented by VISITPA | Pocono | Cup Series | 9 | 3 | 0 | Running |