The NASCAR Playoff Standings for all three series are updated following the race weekend at the Chicago Street Course.

As first reported by JaySki.com, NASCAR released an addition to its rulebook that allows it to limit the number of entries for a Cup Series race to 40 teams. The new rule allows NASCAR to fill open slots based on the team owner’s points standings

NASCAR has reportedly changed its rule book, likely in response to the latest ruling in the antitrust lawsuit by 23XI and Front Row Motorsports, ensuring the two teams will not miss any races as open teams.

Chase Elliott overtakes teammate William Byron for the regular-season points lead; here are other playoff story lines to watch this week.

The NASCAR schedule takes us to Indianapolis Motor Speedway this weekend for one of the most distinguished races in the Cup Series. Sunday’s Brickyard 400 represents the countdown to the playoffs, with only five races remaining. There’s a potential playoff spot at stake and a $1 million prize on the line.

The latest NASCAR Cup Series regular season and playoff standings are in following Sunday's race at Dover Motor Speedway, with Kyle Busch dealt a setback. Despite Busch finishing 11th and collecting stage points along the way during Sunday's action,

Following Sunday's race at Dover Motor Speedway, Byron lost the lead in the regular season standings for the first time since Kansas on May 11. He hasn't fallen below second in the standings all season, but that's now a possibility with five races remaining in the regular season.