The 25-year-old Custer from Ladera Ranch, California, led a race-high 96 of 202 over-scheduled laps and capitalized on an overtime shootout to win the finale in the desert state and become the 33rd different competitor to win an Xfinity Series championship.
The 19-year-old Smith from Johnston, Iowa, notched his first career victory at Phoenix in March, made the 2023 Xfinity Playoffs and finished sixth in the final standings during his first full-time campaign in the Xfinity circuit with Joe Gibbs Racing.
The 2021 Truck Series champion from Louisville, Kentucky, withstood four overtime shootouts and avoided a series of late carnages to claim his second series' title with a top-five finish in the desert state, one spot ahead of title rival Grant Enfinger.
The 2022 ARCA Menards Series champion from Miami, Florida, made the 2023 Truck Series Playoffs and notched five poles and 12 top-10 results throughout the 23-race schedule en route to this year's rookie title.
Ryan Blaney passed Aric Almirola for the lead with 22 laps to go and pulled away to win the Xfinity 500 at Martinsville, winning his way into the Championship 4.
The third-generation Blaney from High Point, North Carolina, led 145 of 500 laps and beat runner-up Aric Almirola by nearly nine-tenths of a second to claim his third Cup Series victory of 2023 and secure his first Championship 4 berth.
The 37-year-old Allgaier from Riverton, Illinois, led 21 of 256 over-scheduled laps and went from third to first on the final lap amid an overtime shootout to claim his fourth Xfinity victory of 2023 and race his way into the Championship 4 round.
This weekend the NASCAR Cup Series and Xfinity Series travel to Martinsville Speedway to set the field for the Championship 4 Playoffs. Cup Series winners Kyle Larson (Las Vegas Motor Speedway) and Christopher Bell (Homestead-Miami Speedway) have secured their spot in the Playoffs.
Following a second straight Sonoma victory, Pro Stock’s Greg Stanfield heads to Pacific Raceways with plenty of momentum for this weekend’s 37th annual Muckleshoot Casino Resort NHRA Northwest Nationals.
