Here are the clinching scenarios for NASCAR's three national series - Sprint Cup, Nationwide and Camping World Trucks:
-Brad Keselowski leads five-time NASCAR Sprint Cup Series champion Jimmie Johnson by 20 points going into Ford Championship Weekend at Homestead-Miami Speedway. Keselowski clinches his first Cup championship with a finish of 15th or better; or 16th and at least one lap led; or 17th and the most laps led, even if Johnson wins and leads the most laps. All other drivers have been eliminated from championship consideration.
-Ricky Stenhouse Jr., who leads by 20 points over second-place Elliott Sadler, will clinch the NASCAR Nationwide Series driver championship with a finish of 16th or better; or 17th or better with at least one lap led; or 18th or better with most laps led at Homestead. In the owners championship battle, the No. 18 Joe Gibbs Racing Toyota guarantees a clinch of the title with a finish of 28th or better; or 29th or better with at least one lap led; or 30th or better with the most laps led. The No. 18 currently leads the No. 6 Roush Fenway Racing Ford by 33 points.
-James Buescher has an 11-point lead over Timothy Peters heading into the Camping World Truck Series finale. Buescher guarantees himself his first championship with a finish of seventh or better with no laps led; or eighth or better with one lap led; or ninth or better with the most laps led.