Daytona 500 pole-winner Chase Briscoe was dealt a major penalty Wednesday when NASCAR said Joe Gibbs Racing had a modified spoiler on the No. 19 Toyota in time trials.

To help you sort out all the possibilities for this year’s season-opening NASCAR Cup Series points race, here’s your day-of guide.

Rain could impact the start time of Sunday's 2025 Daytona 500. Will NASCAR's top race be rescheduled or postponed?

Last year: Daniel Suarez edged Ryan Blaney and Kyle Busch in a three-wide finish. There were 10 cautions and an Atlanta-record 47 lead changes, alongside a pileup of at least 16 cars, the biggest in the history of Atlanta Motor Speedway. Last race: William Byron captured his second Daytona 500 win while narrowly avoiding a final-lap crash.

William Byron, who became the fifth racer in NASCAR history to win back-to-back Daytona 500 races, breaks down the final lap of the 2025 Great American Race with Brandon London.

EXCLUSIVE: William Byron won the Daytona 500 on Sunday night and has had a whirlwind 36 hours since then, landing him at the top of the Empire State Building.