The 36-year-old Allgaier from Riverton, Illinois, led a race-high 83 of 200 laps and stretched his fuel tank while leading the final 33 laps to notch the first victory of the season for himself and JR Motorsports.
The 29-year-old Blaney from High Point, North Carolina, led a race-high 163 of 400 laps and withstood trials and challenges from Mother Nature to the on-track chaos to snap a 59-race winless drought in NASCAR's longest event on the schedule.
The Xfinity Series' Alsco Uniforms 300 at Charlotte has been postponed to Monday with a noon ET start time while Byron was awarded pole position for Sunday's Coke 600 per a metric formula due to inclement weather.
The 2021 Truck Series champion from Louisville, Kentucky, led 37 of 134-scheduled laps, including the final 25, to become the series' sixth different winner and claim the first of three Triple Truck Challenge bonus.
NASCAR heads to Charlotte Motor Speedway for a triple-header schedule of events on Memorial Day weekend. The NASCAR Salutes Together with Coca-Cola program will also be back for the ninth season to pay tribute to the U.S. military members and their families.