NASCAR announced the final installment of the 2020 schedule on Thursday, a 30-race stretch for all three national series that starts with the NASCAR Xfinity Series race on Sept. 5 at Darlington Raceway and ends with the NASCAR Cup Series championship race on Nov. 8 at Phoenix Raceway.(Video above: Kerry Tharp talks about NASCAR’s return at Darlington)The 10-race schedule in the NASCAR Cup Series Playoffs