William Byron (racing driver)

William Byron
Byron at Las Vegas Motor Speedway in 2025
BornWilliam McComas Byron Jr.
(1997-11-29) November 29, 1997
Charlotte, North Carolina, U.S.
Height5 ft 9 in (1.75 m)
Weight154 lb (70 kg)
Achievements2024, 2025 Daytona 500 Winner
2017 NASCAR Xfinity Series Champion
2015 NASCAR K&N Pro Series East Champion
2025 NASCAR Cup Series Regular Season Champion
12th driver in history to win a NASCAR race in all 3 national series at the same track (Iowa)
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
Awards2018 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
NASCAR Cup Series career
292 races run over 8 years
Car no., teamNo. 24 (Hendrick Motorsports)
2025 position4th
Best finish3rd (2023, 2024)
First race2018 Daytona 500 (Daytona)
Last race2026 Straight Talk Wireless 500 (Phoenix)
First win2020 Coke Zero Sugar 400 (Daytona)
Last win2025 Xfinity 500 (Martinsville)
Wins Top tens Poles
16 121 16
NASCAR O'Reilly Auto Parts Series career
44 races run over 6 years
Car no., teamNo. 88 (JR Motorsports)
2025 position77th
Best finish1st (2017)
First race2017 PowerShares QQQ 300 (Daytona)
Last race2026 GOVX 200 (Phoenix)
First win2017 American Ethanol E15 250 (Iowa)
Last win2025 BetMGM 300 (Charlotte)
Wins Top tens Poles
5 27 3
NASCAR Craftsman Truck Series career
31 races run over 6 years
2025 position79th
Best finish5th (2016)
First race2015 Lucas Oil 150 (Phoenix)
Last race2025 Heart of Health Care 200 (Kansas)
First win2016 Toyota Tundra 250 (Kansas)
Last win2022 Blue-Emu Maximum Pain Relief 200 (Martinsville)
Wins Top tens Poles
8 20 3
ARCA Menards Series career
4 races run over 2 years
Best finish58th (2016)
First race2015 Sioux Chief PowerPEX 200 (IRP)
Last race2016 General Tire #AnywhereIsPossible 200 (Pocono)
Wins Top tens Poles
0 3 1
ARCA Menards Series East career
14 races run over 1 year
Best finish1st (2015)
First race2015 Hart to Heart Breast Cancer Foundation 150 (New Smyrna)
Last race2015 Drive Sober 125 (Dover)
First win2015 Kevin Whitaker Chevrolet 150 (Greenville-Pickens)
Last win2015 United Site Services 70 (New Hampshire)
Wins Top tens Poles
4 11 3
ARCA Menards Series West career
3 races run over 2 years
Best finish32nd (2018)
First race2015 Carneros 200 (Sonoma)
Last race2018 Carneros 200 (Sonoma)
Wins Top tens Poles
0 3 0
Statistics up to date as of March 7, 2026.

William McComas Byron Jr. (born November 29, 1997) is an American professional stock car racing driver. He competes full-time in the NASCAR Cup Series, driving the No. 24 Chevrolet ZL1 for Hendrick Motorsports, and part-time in the NASCAR O'Reilly Auto Parts Series, driving the No. 88 Chevrolet SS for JR Motorsports.

Byron won the 2015 NASCAR K&N Pro Series East Championship and the Rookie of the Year award in the 2016 NASCAR Camping World Truck Series season. The following season, he won both the 2017 NASCAR Xfinity Series Championship and the 2017 Sunoco Rookie of the Year. He also won the 2018 NASCAR Cup Series Rookie of the Year award. He is the 2024 and 2025 Daytona 500 winner, and the 2025 NASCAR Cup Series Regular Season Champion.

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