2026 Xfinity 500 Betting Preview
31 October 2026
NASCAR heads to Martinsville Speedway on Sunday for the Xfinity 500. As the penultimate race of the NASCAR Cup Series season, this short-track showdown could officially decide the championship before the field even heads to the finale. Kyle Larson has built a 73-point lead over Denny Hamlin and if he is able to expand his lead to 77 points by the end of Sunday's race, he will mathematically lock up the 2026 NASCAR Cup Series championship a week early.
XFINITY 500 START TIME & RACE INFO
- Event: Xfinity 500
- Where: Martinsville Speedway, Ridgeway, VA
- When: Sunday, November 1 at 2:00 PM ET
- TV: NBC
XFINITY 500 FAVORITES
- Denny Hamlin (Odds to Win: +400)
- Ryan Blaney (Odds to Win: +450)
- Joey Logano (Odds to Win: +700)
- Kyle Larson (Odds to Win: +750)
- William Byron (Odds to Win: +900)
DUNKEL INDEX TOP 10
Here are the Top 10 drivers for this event, according to the Dunkel Index:
| W. Byron | 30.969 |
| D. Hamlin | 29.663 |
| K. Larson | 28.932 |
| C. Bell | 28.171 |
| C. Hocevar | 28.082 |
| T. Reddick | 27.682 |
| R. Blaney | 27.425 |
| R. Chastain | 27.374 |
| J. Berry | 26.805 |
| J. Logano | 26.526 |
WINNER: WILLIAM BYRON (+900)
Byron is the defending champ, having completely dominated the 2025 Xfinity 500 from the pole position while leading a massive 304 laps. Across 17 career Cup starts at the short track, Byron has accumulated 3 victories (Spring 2022, Spring 2024, and Fall 2025) and 2 runner-up finishes. Rated No. 1 in the Dunkel Index, Byron (+900) is our pick to take the checkered flag at Martinsville on Sunday.
TOP 10 FINISH: JOSH BERRY (-120)
Rated No. 9 in the Dunkel Index
