Two-time NASCAR Cup Series champion Kyle Busch was cremated in Mooresville, North Carolina, following his death last week, according to his death certificate first obtained by US Weekly.
The certificate revealed that Busch, 41, had been battling bacterial pneumonia for “days to weeks” before he died May 21 at 4:37 p.m. of natural causes. The pneumonia progressed into sepsis, which set in roughly one day before his death. The sepsis triggered disseminated intravascular coagulation, which is abnormal clotting throughout blood vessels that cuts off flow to organs. That was followed by hemorrhagic shock caused by severe bleeding. The DIC and hemorrhagic shock lasted for hours.
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Busch’s family announced Saturday that severe pneumonia had progressed into sepsis, “resulting in rapid and overwhelming associated complications.”
There were multiple reports that Busch was visibly ill in the weeks before he died. FOX Sports reported he had asked for a doctor during the Cup Series race in Watkins Glen on May 10. “I’m gonna need a shot,” Busch said.
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See the most heartfelt moments with Kyle Busch and his family.
Kyle Busch’s career left a lasting mark on NASCAR, with achievements and moments that defined his time in the sport.
Above, Kyle Busch, driver of the No. 7 HendrickCars.com Chevrolet, celebrates with daughter, Lennix Busch son, Brexton Busch and wife, Samantha Busch in victory lane after winning the NASCAR Craftsman Truck Series Fr8 Racing 208 at Echo Park Speedway on Feb. 21, 2026, in Hampton, Georgia.
(Sean Gardner, Getty Images)
1 / 18
See the most heartfelt moments with Kyle Busch and his family.
Kyle Busch’s career left a lasting mark on NASCAR, with achievements and moments that defined his time in the sport.
Above, Kyle Busch, driver of the No. 7 HendrickCars.com Chevrolet, celebrates with daughter, Lennix Busch son, Brexton Busch and wife, Samantha Busch in victory lane after winning the NASCAR Craftsman Truck Series Fr8 Racing 208 at Echo Park Speedway on Feb. 21, 2026, in Hampton, Georgia.
(Sean Gardner, Getty Images)
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Remembering Kyle Busch’s life and NASCAR career in photos
Kyle Busch, driver of the No. 8 zone/Thorntons Chevrolet, exits his car and reacts after an on-track incident during the NASCAR Cup Series Ally 400 at Nashville Superspeedway on June 30, 2024, in Lebanon, Tennessee.
(Sean Gardner, Getty Images)
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Remembering Kyle Busch’s life and NASCAR career in photos
Kyle Busch, driver of the No. 7 Gainbridge Chevrolet, celebrates in victory lane after winning the NASCAR Craftsman Truck Series Fr8 208 at Atlanta Motor Speedway on Feb. 22, 2025, in Hampton, Georgia.
(Jonathan Bachman, Getty Images)
4 / 18
Remembering Kyle Busch’s life and NASCAR career in photos
Kyle Busch, driver of the No. 7 HendrickCars.com Chevrolet, celebrates after winning the NASCAR Craftsman Truck Series Fr8 Racing 208 at Echo Park Speedway on Feb. 21, 2026, in Hampton, Georgia.
(Jonathan Bachman, Getty Images)
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Remembering Kyle Busch’s life and NASCAR career in photos
Kyle Busch, driver of the No. 54 Monster Energy Toyota, celebrates in Victory Lane after winning the NASCAR XFINITY Series Kansas Lottery 300 at Kansas Speedway on Oct. 17, 2015, in Kansas City, Kansas.
(Matt Sullivan, Getty Images)
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Remembering Kyle Busch’s life and NASCAR career in photos
Kyle Busch, driver of the No. 18 M&M’s Crispy Toyota, celebrates winning the series championship and the NASCAR Sprint Cup Series Ford EcoBoost 400 at Homestead-Miami Speedway on Nov. 22, 2015, in Homestead, Florida.
(Mike Ehrmann, Getty Images)
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Remembering Kyle Busch’s life and NASCAR career in photos
Kyle Busch, driver of the No. 18 M&M’s Crispy Toyota, celebrates winning the series championship and the NASCAR Sprint Cup Series Ford EcoBoost 400 at Homestead-Miami Speedway on Nov. 22, 2015, in Homestead, Florida.
(Mike Ehrmann, Getty Images)
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Remembering Kyle Busch’s life and NASCAR career in photos
Kyle Busch, driver of the No. 18 M&M’s Toyota, celebrates in victory lane after winning the Monster Energy NASCAR Cup Series Championship and the Monster Energy NASCAR Cup Series Ford EcoBoost 400 at Homestead Speedway on Nov. 17, 2019, in Homestead, Florida.
(Sean Gardner, Getty Images)
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Remembering Kyle Busch’s life and NASCAR career in photos
Kyle Busch, driver of the No. 7 Gainbridge Chevrolet, and crew celebrate in victory lane after winning the NASCAR Craftsman Truck Series Fr8 208 at Atlanta Motor Speedway on Feb. 22, 2025, in Hampton, Georgia.
(Chris Graythen, Getty Images)
10 / 18
See the most heartfelt moments with Kyle Busch and his family.
Kyle Busch, driver of the No. 7 Realtree Chevrolet, celebrates with his wife, Samantha Busch, and daughter, Lennix Busch victory lane after winning the NASCAR Craftsman Truck Series SpeedyCash.com 250 at Texas Motor Speedway on April 12, 2024, in Fort Worth, Texas.
(Chris Graythen, Getty Images)
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Remembering Kyle Busch’s life and NASCAR career in photos
Kyle Busch, driver of the No. 8 Cheddar’s Scratch Kitchen Chevrolet, waves to fans as he walks onstage during driver intros prior to the NASCAR Cup Series Coke Zero Sugar 400 at Daytona International Speedway on Aug. 24, 2024, in Daytona Beach, Florida.
(Sean Gardner, Getty Images)
12 / 18
See the most heartfelt moments with Kyle Busch and his family.
Kyle Busch, driver of the No. 7 HendrickCars.com Chevrolet, celebrates with his daughter, Lennix Busch in victory lane after winning the NASCAR Craftsman Truck Series Fr8 Racing 208 at Echo Park Speedway on Feb. 21, 2026, in Hampton, Georgia.
(Sean Gardner, Getty Images)
13 / 18
Remembering Kyle Busch’s life and NASCAR career in photos
Kyle Busch, driver of the No. 18 M&M’s Crispy Toyota, celebrates with his son Brexton and wife Samantha in Victory Lane after winning the series championship and the NASCAR Sprint Cup Series Ford EcoBoost 400 at Homestead-Miami Speedway on Nov. 22, 2015, in Homestead, Florida.
(Chris Graythen, Getty Images)
14 / 18
Remembering Kyle Busch’s life and NASCAR career in photos
Kyle Busch, driver of the No. 7 Gainbridge Chevrolet, celebrates after winning the NASCAR Craftsman Truck Series Fr8 208 at Atlanta Motor Speedway on Feb. 22, 2025, in Hampton, Georgia.
(Chris Graythen, Getty Images)
15 / 18
See the most heartfelt moments with Kyle Busch and his family.
Kyle Busch, driver of the No. 7 Realtree Chevrolet, celebrates with his wife, Samantha Busch, and daughter, Lennix Busch victory lane after winning the NASCAR Craftsman Truck Series SpeedyCash.com 250 at Texas Motor Speedway on April 12, 2024, in Fort Worth, Texas.
(Sean Gardner, Getty Images)
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Remembering Kyle Busch’s life and NASCAR career in photos
Kyle Busch, driver of the No. 8 3CHI Chevrolet, celebrates after winning the NASCAR Cup Series Enjoy Illinois 300 at WWT Raceway on June 4, 2023, in Madison, Illinois.
(Jeff Curry, Getty Images)
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Remembering Kyle Busch’s life and NASCAR career in photos
Kyle Busch, driver of the No. 7 Gainbridge Chevrolet, celebrates with a burnout after winning the NASCAR Craftsman Truck Series Fr8 208 at Atlanta Motor Speedway on Feb. 22, 2025, in Hampton, Georgia.
(Chris Graythen, Getty Images)
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Remembering Kyle Busch’s life and NASCAR career in photos
Kyle Busch, driver of the No. 7 Gainbridge Chevrolet, celebrates in victory lane after winning the NASCAR Craftsman Truck Series Fr8 208 at Atlanta Motor Speedway on Feb. 22, 2025, in Hampton, Georgia.
(Jonathan Bachman, Getty Images)
On May 16, a day after winning a Truck Series race at Dover, he told The Athletic he was “still not great,” adding the prior week’s cough was “pretty substantial.”
On May 19, Busch attended the opening of an indoor karting facility in Durham, North Carolina, and posed for photos at his team’s race shop the following day.
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Around 5:30 p.m. on May 20, a 911 caller reported someone at the General Motors Charlotte Technical Center in Concord, North Carolina, was struggling to breathe, feeling very hot, thinking he was going to pass out and coughing up blood, according to a recording obtained by USA TODAY. The caller said the person was on the bathroom floor and asked responders to silence their sirens when they arrived.
Busch died at 4:37 p.m. the next day.
NASCAR, Busch’s team and his family jointly announced his passing less than an hour later at 5:30 p.m.
He is survived by his wife Samantha and their children Brexton, 11, and Lennix, 4. They made their first public appearance three days later at the Coca-Cola 600 for a pre-race tribute.
This article originally appeared on USA TODAY: Kyle Busch death certificate reveals new details about driver’s death