AP photo by Terry Renna / Kevin Harvick leads the field to start a NASCAR Cup Series race on the road course at Daytona International Speedway on Aug. 16 in Daytona Beach, Fla.

DAYTONA BEACH, Fla. — Racing at Daytona International Speedway always comes with a hefty dose of drama. Bad breaks. Close calls. Harrowing crashes. Overtime affairs. Last-lap heroics. Underdog stories.

NASCAR's top-tier Cup Series could have all the above during its regular-season finale Saturday night.

The final three playoff spots are up for grabs as the series returns to the high-banked superspeedway two weeks after running the road course that includes a large portion of the tri-oval. Nearly half the field is looking to clinch a postseason berth with a victory, including seven-time season champion Jimmie Johnson. The high stakes could make for a 400-mile, white-knuckle ride at close to 200 mph.

"A lot of people are desperate," said Team Penske driver Joey Logano, the 2018 Cup Series champion who is already locked into the playoffs. "Crazy things will happen."

That's exactly what NASCAR envisioned when it moved Daytona's summertime extravaganza to the regular-season finale. Cup Series races at Daytona already were considered wild-card events in which just about anyone could end up in victory lane. Now there's even more on the line.

That's particularly true for Johnson, who is retiring as a full-time driver at the end of the season. He likely would be safely in the predicted playoff field had he not missed a race because he tested positive for COVID-19 and had a second-place finish thrown out after his car failed inspection.

"We'll see how it plays out. It could be a storybook ending for us, which would be amazing, and I know the fans would really appreciate that and enjoy it," Johnson said. "We all understand the storylines. I'm excited. I'm ready to go. I'm not one to spend too much time to get overly sentimental."

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AP photo by John Raoux / Jimmie Johnson drives down pit road on his way to the track during a practice session on Feb. 15, 2019, at Daytona International Speedway. The final three playoff spots are up for grabs as the NASCAR Cup Series returns to Daytona Beach, Fla., for the final race of the regular season at the same track where it began.

Johnson's winless drought is at 119 races, dating to June 2017. He has won three times at Daytona, with his most recent victory at the track in 2013.

He enters the weekend trailing Matt DiBenedetto by nine points and Hendrick Motorsports teammate William Byron by four in the standings. Johnson's best shot at making the postseason — assuming he doesn't win at Daytona — requires him to make up ground on DiBenedetto or Byron in the points and not have someone below him in the standings pull off a huge upset.

Adding to the intrigue, Johnson's former longtime crew chief for the No. 48 Chevrolet, Chad Knaus, is now atop Byron's pit box.

"I've been there. I've had him coaching me along. I just know where his head is, and I know how difficult and weird it is to look at the 48 car as the guy they've got to beat, and then the way you go about motivating yourself to beat your competition," Johnson said. "I'm sitting on my side going through the same thing, and it's William and Chad, specifically Chad."

Thirteen spots are already secured for the 16-driver postseason field. Points leader Kevin Harvick, Denny Hamlin, Brad Keselowski, Chase Elliott, Logano, Martin Truex Jr., Ryan Blaney, Alex Bowman, Austin Dillon, Cole Custer, Aric Almirola, Kyle Busch and Kurt Busch are locked in.

Clint Bowyer is 14th and needs just three points to clinch a playoff spot. DiBenedetto, Byron and Johnson are essentially vying for the final two positions.

But if an outlier wins — notable drivers include Erik Jones, Matt Kenseth, Ryan Newman, Ricky Stenhouse Jr. and Bubba Wallace — then there would just be one spot remaining for those three drivers on the bubble.

"Nothing really fazes me a whole lot at this point in my career," said DiBenedetto, who drives the No. 21 Ford for Wood Brothers Racing. "All I can do is just not really stress. I let my wife do all the stressing for me. She's been a basket case of emotion this week."

Tiny Lund (1963), Greg Sacks (1985), Derricke Cope (1990) and Trevor Bayne (2011) are among the most shocking winners at NASCAR's hometown track. Last year, Justin Haley added another fluky outcome to Daytona's lore by winning a rain-shortened July race.

So anything can happen at Daytona. Throw in the raised stakes, and it's sure to create an extremely intense couple of hours on the track.

"It's going to be crazy all the way down to the finish," Stenhouse said. "I think it's going to keep everybody on the edge of their seat for sure."