The field for NASCAR’s Round of 8 playoffs was finalized Sunday after Christopher Bell crossed the finish line in first place at the Roval at Charlotte Motor Speedway. Bell held off Kevin Harvick in the overtime portion of the Bank of America Roval 400 to join Chase Elliott as the only two drivers to clinch a spot in the next round of the playoffs with a victory. Elliott won the YellaWood 500 at Talladega last weekend. Christopher Bell, driver of the No.