The 20-year-old Gibbs from Charlotte, North Carolina, led a race-high 125 of 200-scheduled laps and persevered in a late battle against rivals Gragson and Allgaier to claim his first Xfinity title by winning the finale at Phoenix.
The 20-year-old Gibbs from Charlotte, North Carolina, spoiled teammate Brandon Jones' title hopes by claiming a wild final lap victory and earning himself a spot for the 2022 Xfinity championship finale.
The NASCAR Cup Series and Xfinity Series travel to Martinsville Speedway this week. After the race, only four drivers from each series will move on to compete for the 2022 championship trophy at Phoenix Raceway on Nov. 6.
The 40-year-old Allmendinger from Los Gatos, California, led a race-high 25 of 72 over-scheduled laps and prevailed through two overtime attempts to claim his fourth consecutive Xfinity victory at the Roval.