Race leader William Byron finished a four-lap shootout under caution in a Presidents' Day Daytona 500 delayed a day because of rain, making him the winner of the 66th running of the Great American Race on Monday in Daytona Beach, Fla.
As the late-afternoon start turned into night at the historic Daytona International Speedway and with the white flag approaching, Ross Chastain made a move into the middle lane and wrecked with second-place Austin Cindric.
That gave Byron his first Daytona 500 win and 11th of his career in the series.
The victory was the ninth 500 win for Hendrick Motorsports.
Teammate Alex Bowman was second, followed by Christopher Bell, Corey LaJoie and Bubba Wallace.
Pole winner Joey Logano led a race-high 45 laps but finished 32nd after being collected in the race's biggest wreck.
In his 21st start in the season-opening points race, seven-time Cup Series champion Jimmie Johnson was clipped by Carson Hocevar on Lap 5 and finished 28th in the 40-car field.
As Logano and Michael McDowell headed the field at full speed on Lap 5, Brad Keselowski's No. 6 Ford bumped John Hunter Nemechek's No. 42 Toyota at about 10th place, sparking a seven-car wreck that involved Johnson's No. 84 Toyota.
Chase Elliott led a five-car brigade past fellow Chevrolet driver Kyle Busch on Lap 65 to win Stage 1 as Chevy claimed the top six spots, with Busch in the final position.
However, Busch's No. 8 car had to restart in 29th, penalized after having an extra crew member come over the wall during the ensuing pit stop.
Running second to Team Penske teammate Cindric, reigning 2023 Cup champion Ryan Blaney slipped under the No. 2 Ford at the east end of the superspeedway and won Stage 2 at Lap 130.
Busch had problems for a second time on pit road and lost positions, as the center lug nut was not attached.
He limped his No. 8 Richard Childress Racing Chevrolet around the massive track, came back to pit road for service and restarted in 18th. Busch would go on to finish the race 12th.
After the final pit green-flag pit stops with just over 20 laps left, the cars ran three-wide over eight rows deep until Byron, running fourth, clipped second-place Keselowski and triggered the Big One -- an 18-car melee in Turn 3 with nine laps left.
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