AVONDALE, Ariz. (AP) — The rivalry hardly reaches the heights of Petty versus Pearson or Earnhardt against Gordon as one of NASCAR’s great competitions. But there is no doubt that dozens of dirt track battles between Kyle Larson and Christopher Bell have created an interesting dynamic ahead of Sunday's championship. Larson beat Bell at Las Vegas Motor Speedway to claim the first of four spots in Sunday's title-deciding season finale, then Bell won the next week at Homestead-Miami Speedway to take the second slot.