| William Byron |
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| Born | William McComas Byron Jr.
(1997-11-29) November 29, 1997
Charlotte, North Carolina, U.S. |
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| Height | 5 ft 9 in (1.75 m) |
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| Weight | 154 lb (70 kg) |
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| Achievements | 2024, 2025 Daytona 500 Winner
2017 NASCAR Xfinity Series Champion
2015 NASCAR K&N Pro Series East Champion
Most wins by a rookie in the NASCAR Camping World Truck Series (7 in 2016)
2022 Slinger Nationals Winner
2022, 2023 Clyde Hart Memorial Winner
2022 Money in the Bank 150 Winner
2022 North-South Super Late Model Challenge Winner
2022 Orange Blossom 100 Winner
2019 Daytona 500 Pole Winner
2020 Bluegreen Vacations Duel Winner |
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| Awards | 2018 Monster Energy NASCAR Cup Series Rookie of the Year
2017 NASCAR Xfinity Series Rookie of the Year
2016 NASCAR Camping World Truck Series Rookie of the Year
2015 NASCAR K&N Pro Series East Rookie of the Year |
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| 268 races run over 8 years |
| Car no., team | No. 24 (Hendrick Motorsports) |
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| 2024 position | 3rd |
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| Best finish | 3rd (2023, 2024) |
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| First race | 2018 Daytona 500 (Daytona) |
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| Last race | 2025 Viva México 250 (Mexico City) |
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| First win | 2020 Coke Zero Sugar 400 (Daytona) |
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| Last win | 2025 Daytona 500 (Daytona) |
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| Wins |
Top tens |
Poles |
| 14 |
114 |
15 |
|
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|
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| 43 races run over 5 years |
| Car no., team | No. 17 (Hendrick Motorsports) |
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| 2024 position | 84th |
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| Best finish | 1st (2017) |
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| First race | 2017 PowerShares QQQ 300 (Daytona) |
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| Last race | 2025 BetMGM 300 (Charlotte) |
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| First win | 2017 American Ethanol E15 250 (Iowa) |
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| Last win | 2025 BetMGM 300 (Charlotte) |
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| Wins |
Top tens |
Poles |
| 5 |
27 |
3 |
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| 31 races run over 6 years |
| Truck no., team | No. 07 (Spire Motorsports) |
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| 2023 position | 88th |
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| Best finish | 5th (2016) |
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| First race | 2015 Lucas Oil 150 (Phoenix) |
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| Last race | 2025 Heart of Health Care 200 (Kansas) |
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| First win | 2016 Toyota Tundra 250 (Kansas) |
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| Last win | 2022 Blue-Emu Maximum Pain Relief 200 (Martinsville) |
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| Wins |
Top tens |
Poles |
| 8 |
20 |
3 |
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|
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| 4 races run over 2 years |
| Best finish | 58th (2016) |
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| First race | 2015 Sioux Chief PowerPEX 200 (IRP) |
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| Last race | 2016 General Tire #AnywhereIsPossible 200 (Pocono) |
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| Wins |
Top tens |
Poles |
| 0 |
3 |
1 |
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| 14 races run over 1 year |
| Best finish | 1st (2015) |
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| First race | 2015 Hart to Heart Breast Cancer Foundation 150 (New Smyrna) |
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| Last race | 2015 Drive Sober 125 (Dover) |
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| First win | 2015 Kevin Whitaker Chevrolet 150 (Greenville-Pickens) |
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| Last win | 2015 United Site Services 70 (New Hampshire) |
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| Wins |
Top tens |
Poles |
| 4 |
11 |
3 |
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| 3 races run over 2 years |
| Best finish | 32nd (2018) |
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| First race | 2015 Carneros 200 (Sonoma) |
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| Last race | 2018 Carneros 200 (Sonoma) |
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| Wins |
Top tens |
Poles |
| 0 |
3 |
0 |
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| Statistics up to date as of May 24, 2025. |