The 2025 NASCAR Cup Series postseason winds down with the final Round of 8 race on Sunday at Martinsville Speedway. The NASCAR Cup Series Championship follows next week. Ryan Blaney is the favorite at +400 (risk $100 to win $400) in the 2025 Martinsville Speedway 500 odds, while Kyle Larson and Denny Hamlin are at +500, Christopher Bell and Chase Elliott are at +650, and William Byron and Joey Logano are at +850. Sunday's race is set to begin at 2 p.m. ET. 

Before entering any 2025 Xfinity 500 props or NASCAR picks on sites like PrizePicks, DraftKings Pick6, Sleeper Fantasy and Underdog Fantasy, be sure to see what elite expert auto racing handicappers Phil Bobbitt and Steve Greco have to say.

Bobbitt and Greco built a predictive engine that consistently beats the books. They find huge value and aren't afraid of volume. Over the past four years, their followers could be up more than $28,000 on $100 plays. Last season, they nailed seven outright winners in the Cup Series, returning nearly seven units for a 25.7% ROI. 

They predicted Daniel Suarez's victory in Atlanta at +3500 and were 10-2 on matchup plays. Their 2024 NASCAR All-Star Race preview nailed Joey Logano at +1100 and went 4-0 in matchup picks, and they hit Austin Cindric at +2800 in the Enjoy Illinois 300. They also nailed Ross Chastain as a +3000 longshot in the Hollywood Casino 400. Overall, they were up 47.18 units across all racing articles last season. This season, they have correctly called William Byron (+2300) in the Daytona 500 and Kyle Larson (+450) in the AdventHealth 400. Anyone following Bobbitt and Greco could have seen HUGE returns!

For the 2025 Xfinity 500 at the Martinsville Speedway, we can tell you Bobbitt and Greco are backing Denny Hamlin over Christopher Bell (-105) in a head-to-head matchup. "Christopher Bell only needs to beat one guy on Sunday — Kyle Larson. Denny Hamlin, on the other hand, wants to beat everyone. He's already locked into the finale and has openly talked about how much prep time he's pouring into Phoenix. But Hamlin's the kind of guy who doesn't know how to "coast." His playbook doesn't care about stage points or popular strategy. It's all execution, all the time." 

Bobbitt and Greco have locked in more NASCAR bets, including a longshot bet that pays 45-1! You ABSOLUTELY NEED to see their picks before locking in any NASCAR picks of your own.

So who wins the 2025 Xfinity 500 and which NASCAR prop picks could help you dominate on sites like PrizePicks, and which outright bet is a MUST-BACK? ... Join SportsLine right now to see the NASCAR at Las Vegas Motor Speedway best bets, all from the experts who were up 47 units last year!