All three NASCAR national series are in action this weekend.

Cup and Xfinity teams race at Daytona. Craftsman Truck Series teams begin their playoffs at Milwaukee.

Two races remain in the regular season for the Cup Series.

Chris Buescher won this race at Daytona last year.

William Byron won the Daytona 500 earlier this season.

In a stunning move, NASCAR has revoked Austin Dillon’s automatic berth into the 16-driver NASCAR Cup Series playoff field for his moves on the final lap Sunday at Richmond Raceway.

Dillon won the race following a last-lap incident where he turned Joey Logano and then hooked Denny Hamlin to take the checkered flag and what he thought was an automatic playoff berth that goes with a regular-season win.

NASCAR will not strip Dillon of the win, but it won’t allow him to use the win for an automatic playoff berth.

Dillon was also docked 25 points in the standings and his spotter, Brandon Benesch, was suspended for three races.

NASCAR rules allow for that decision as the playoff eligibility requirements state.

“Race finishes must be unencumbered by violation(s) of the NASCAR Rules or other action(s) detrimental to stock car auto racing or NASCAR as determined in the sole discretion of NASCAR.”

NASCAR also issued a $50,000 fine to Logano for smoking his tires as he drove by Dillon’s crew and family on pit road following the race.

Logano said he will not appeal the fine.