Martinsville winner Ryan Blaney on Sunday became the third Round of 8 winner to qualify for the NASCAR Cup Series Championship, joining Kyle Larson and Christopher Bell.
William Byron barely edged Denny Hamlin by eight points for the fourth and final qualifying spot.
Hamlin, who was 4.149 seconds from the victory and his own ticket to the Championship 4, finished third in the race behind Blaney and runner-up Aric Almirola on Sunday.
The other three Round of 8 drivers to come up short were Chris Buescher, regular-season champ Martin Truex Jr. and Tyler Reddick. Buescher finished eighth, while Truex was 12th and and Reddick 26th.
Points are out the window in Phoenix. The driver who finishes best among the four—regardless of where that is—will be crowned the champion.
NASCAR Cup Series Championship 4 Field
Kyle Larson (4), Chevrolet
Christopher Bell (2), Toyota
Ryan Blaney (3), Ford
William Byron (6), Chevrolet
(2023 wins in parenthesis)