Tyler Reddick became the second NASCAR Cup Series driver to secure a spot in the Championship 4 with a last-lap pass for the victory at Homestead-Miami Speedway.
Reddick, who had entered the race 30 points below the cutline after a 35th at Las Vegas Motor Speedway, joined Joey Logano in the title race with his third victory this season and eighth of his career.
The Nov. 3 race at Martinsville Speedway will lock in the final two spots in the Championship 4 field. The title will be decided in the Nov. 10 season finale at Phoenix Raceway.
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A win at Martinsville would advance one of the remaining six eligible drivers into the championship race.
The two drivers above the cutline after Las Vegas are Christopher Bell (plus-29 points) and William Byron (plus-7).
Below the cutline are Kyle Larson (minus-7), Denny Hamlin (minus-18), Blaney (minus-38) and Chase Elliott (minus-43).
Here is the finishing order at Homestead-Miami Speedway:
1. Tyler Reddick, No. 45 Toyota
2. Ryan Blaney, No. 12 Ford
3. Denny Hamlin, No. 11 Toyota
4. Christopher Bell, No. 20 Toyota
5. Chase Elliott, No. 9 Chevrolet
6. William Byron, No. 24 Chevrolet
7. Alex Bowman, No. 48 Chevrolet
8. AJ Allmendinger, No. 16 Chevrolet
9. Carson Hocevar, No. 77 Chevrolet
10. Ryan Preece, No. 41 Ford
11. Josh Berry, No. 4 Ford
12. Chase Briscoe, No. 14 Ford
13. Kyle Larson, No. 5 Chevrolet
14. Michael McDowell, No. 34 Ford
15. Chris Buescher, No. 17 Ford
16. Daniel Suarez, No. 99 Chevrolet
17. Brad Keselowski, No. 6 Ford
18. Bubba Wallace, No. 23 Toyota
19. Noah Gragson, No. 10 Ford
20. Todd Gilliland, No. 38 Ford
21. Ricky Stenhouse Jr., No. 47 Chevrolet
22. Erik Jones, No. 43 Toyota
23. Martin Truex Jr., No. 19 Toyota
24. Harrison Burton, No. 21 Ford
25. Austin Dillon, No. 3 Chevrolet
26. John Hunter Nemechek, No. 42 Toyota
27. Austin Cindric, No. 2 Ford
28. Joey Logano, No. 22 Ford
29. Daniel Hemric, No. 31 Chevrolet
30. Zane Smith, No. 71 Chevrolet
31. Kyle Busch, No. 8 Chevrolet
32. Kaz Grala, No. 15 Ford
33. Ross Chastain, No. 1 Chevrolet
34. Justin Haley, No. 7 Chevrolet
35. Corey LaJoie, No. 51 Ford
36. Ty Gibbs, No. 54 Toyota
37. Chad Finchum, No. 66 Ford
38. JJ Yeley, No. 44 Chevrolet