One race and three more spots are up for grabs in the Championship 4 for the Monster Energy NASCAR Cup Series Playoffs. Sunday’s Can-Am 500 at ISM Raceway in Phoenix (2:30 p.m. ET, NBC/NBC Sports App, MRN, SiriusXM NASCAR Radio) will see seven drivers compete for the final spots available in the postseason finale at Homestead-Miami Speedway on Nov. 18.

Monster Energy NASCAR Cup Series

• Kyle Busch: Busch would clinch with 31 points and a new winner. If there is a repeat winner (or a win by Martin Truex Jr., Kevin Harvick or a non-playoff driver), he would clinch with 28 points. With a win, he would clinch.

• Martin Truex Jr.: Truex would clinch with 34 points and a new winner. If there is a repeat winner (or a win by Kyle Busch, Kevin Harvick or a non-playoff driver), he would clinch with 31 points. With a win, he would clinch.

• Kevin Harvick: If there is a repeat winner (or a win by Kyle Busch, Martin Truex Jr. or a non-playoff driver), he would clinch with 53 points. With a win, he would clinch. Harvick could also clinch on points with a new winner, but would need help depending on the winner.

RELATED: Playoff standings | Full schedule for ISM Raceway

• Kurt Busch: The only guaranteed result that gives Kurt Busch a Championship 4 spot is a win. Busch could also clinch on points, but would need help depending on the winner.

• Chase Elliott: The only guaranteed result that gives Elliott a Championship 4 spot is a win. Elliott could also clinch on points, but would need help depending on the winner.

• Aric Almirola: Almirola can only clinch a spot with a win.

• Clint Bowyer: Bowyer can only clinch a spot with a win.

NASCAR Xfinity Series

Cole Custer won at Texas and Christopher Bell prevailed in a must-win scenario at Phoenix to seal automatic berths in the Championship 4. Daniel Hemric and Tyler Reddick advanced to the Homestead-Miami finale on the basis of points, completing a field of four drivers from four organizations for the title battle.

NASCAR Camping World Truck Series

Johnny Sauter locked up a Championship 4 spot with a win at Martinsville, while Justin Haley prevailed at Texas to secure his fate in Miami. Brett Moffitt won at ISM Raceway to lock in, while Noah Gragson reached the Championship 4 on points.