NASCAR at Darlington: Key info, links, results for Chase race weekend

The NASCAR Cup Series and NASCAR O'Reilly Auto Parts Series head to the track "Too Tough to Tame" this weekend as The Chase presented by Mobil 1 gets underway for both tours. Sunday night marks the 77th running of the crown jewel Southern 500, where Chase Briscoe enters as the defending two-time winner. As for the O'Reilly Auto Parts Series, Saturday night will mark the first time Darlington hosts a postseason race. Bookmark this page and come back often for your race-week essentials -- from qualifying orders, pit stalls, results and more. RELATED: Full weekend schedule | TV listings | Goodyear tire setup

NASCAR Cup Series

Race day: Sunday at 5 p.m. ET on USA Network. The categories listed below will be filled out with links as the information becomes available. Tires: Fifteen total sets -- 12 new sets for the race, two for practice and one for qualifying that transfers to the race. Entry List Qualifying Order Practice Results Practice Lap Averages Practice Lap Times Qualifying Results Pit Stalls Stage 1 Results Stage 2 Results Race Results

NASCAR O'Reilly Auto Parts Series

Race day: Saturday at 7:30 p.m. ET on The CW. The categories listed below will be filled out with links as the information becomes available. Tires: Seven total sets -- four new sets for the race, two for practice and one for qualifying that transfers to the race. Entry List Qualifying Order Practice Results Practice Lap Averages Practice Lap Times Qualifying Results Pit Stalls Stage 1 Results Stage 2 Results Race Results