He then spent the final 1½ laps on the 2.28-mile, 17-turn Charlotte Roval course holding off a spirited challenge from Noah Gragson to win the Xfinity Series race at Charlotte for the second consecutive season.
The win is Allmendinger’s second win of the season and fifth of his career.
The race featured 10 cautions, a nearly 39-minute red-flag for standing water on the track and was run nearly entirely in the rain.
Early in the race, with standing water on the track, Allmendinger repeatedly complained to his team over the radio that NASCAR should be stopping the race.
“I don’t know what we just witnessed,” Allmendinger said. “Chris Rice (crew chief) stuck with me, I’m not going to lie, I was complaining the whole race. That was miserable, crazy.
“Chase Briscoe was doing a fantastic job. I didn’t really have anything for him after a couple laps but I knew that final restart, I was going to do whatever I could.
“IMSA has headlights, so it’s not as bad. But in the infield, with no lights in there, and the world’s biggest jumbotron blaring in, you couldn’t see anything. I was just guessing where the corners were, just praying that when you hit the puddle, you don’t go sliding off the race track.”
Daniel Hemric finished third, Alex Labbe was fourth and Ross Chastain rounded out the top-five. Completing the top-10 were Austin Cindric, Cody Ware, Jade Buford, Michael Annett and Brandon Jones.
Briscoe ended up 18th.
“The driver just made a mistake,” Briscoe said. “With conditions like these, you need to be 100 percent and I tried to go 110 and it bit me. I felt like I did my job for about 95 percent of the day right.
“I just hit a puddle and it spun me out.”
Four drivers were eliminated from further competition in the Xfinity Series playoffs following the race – Harrison Burton, Brandon Brown, Riley Herbst and Annett.