Bubba Wallace and Ross Chastain entered Daytona battling for the final playoff spot. Then Harrison Burton won and put Wallace & Chastain both below the cut line!

Chris Buescher enters the Southern 500 21 points ahead of Wallace, while Ty Gibbs sits a somewhat comfortable 39 points to the good entering the regular season finale at Darlington. Martin Truex Jr. is all but assured a spot in the playoffs with a 58-point cushion.

Can Wallace or Chastain win the Southern 500 to clinch a playoff spot? And what about other drivers on the outside, such as former Darlington winners Erik Jones and Kyle Busch?

In this clip from the O'Reilly Auto Parts Pit Reporter, Jim Utter and FS1's Adam Alexander break down the playoff bubble and how drivers on the outside have to approach the Southern 500 at Darlington. Can Wallace and Chastain go for stage points or is it all about the win? Meanwhile, Adam explains why the playoff race could get blown up again should someone like Erik Jones win on Sunday night. #NASCAR #NASCARPlayoffs #Southern500

0:00 Burton blows up the playoff picture
2:05 Erik Jones: The Darlington dark horse?
3:13 NASCAR's most grueling race
5:25 Regular season championship battle

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