Kyle Busch died of pneumonia leading to complications from sepsis
NASCAR driver Kyle Busch, 41, tragically died from severe pneumonia that progressed to sepsis, his family has confirmed. Dr. Cedric Rutland, a pulmonary critical care physician and spokesperson for the American Lung Association, explains how inflammation and infection caused by pneumonia can overwhelm the body.
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Brexton Busch, the 11-year-old son of NASCAR legend Kyle Busch, returned to the racetrack Tuesday for the first time since his father’s death nearly two weeks ago.
Busch took practice laps at Charlotte Motor Speedway before the CookOut Summer Shootout, a Legend Car Series race. Kyle Busch, 41, died suddenly late last month after a battle with pneumonia turned into sepsis.
A private memorial service was held for Busch Tuesday afternoon. The family announced that a public ceremony would be held later this year.
Kyle Busch, driver of the No. 7 HendrickCars.com Chevrolet, and his son Brexton Busch take the stage during driver introductions before the NASCAR Craftsman Truck Series Fr8 Racing 208 at Echo Park Speedway in Hampton, Georgia on February 21, 2026. (Sean Gardner/Getty Images)
“On behalf of the Busch family, everyone at Richard Childress Racing and all of NASCAR, we are devastated to announce the sudden and tragic passing of Kyle Busch,” the family said in a statement following Busch’s May 21 death.
KYLE BUSCH, TWO-TIME NASCAR CUP SERIES CHAMPION, TRAGICALLY DIES AT 41 AFTER HOSPITALIZATION
“Our entire NASCAR family is heartbroken by the loss of Kyle Busch. A future Hall of Famer, Kyle was a rare talent, one that comes along only once in a generation. He was fierce, he was passionate, he was immensely knowledgeable and he cared deeply about the sport and the fans.”
Brexton Busch takes a ride in NASCAR at RCR
Busch was a two-time Cup champion and undoubtedly a future Hall of Famer. He had competed in the Cup Series since 2004, making 762 career starts with 63 victories. The 41-year-old won the championship in 2015 and 2019 and has 234 victories across the three national NASCAR series.
Busch is the all-time record holder for wins in the NASCAR O’Reilly Auto Parts Series (102) and NASCAR Craftsman Truck Series (69). Busch’s 234th and final NASCAR victory came at Dover a week before his death, when he led 147 laps in a dominant Truck Series victory.
Kyle Busch, driver of the No. 7 HendrickCars.com Chevrolet, is congratulated by his son Brexton Busch after winning the NASCAR Craftsman Truck Series Fr8 Racing 208 at Echo Park Speedway in Hampton, Georgia on February 21, 2026. (Jonathan Bachman/Getty Images)
A day after his death, the car’s owner, Richard Childress, told reporters that RCR would suspend use of Busch’s No. 8 until Brexton was eligible to use it.
“Richard Childress Racing has elected to suspend use of the No. 8 and will run the No. 33 at Charlotte Motor Speedway and beyond,” the team said in a statement. “Kyle Busch was instrumental in the design of RCR’s stylized number 8, and it has become synonymous with Kyle and an important symbol to his fans and the NASCAR industry. No one can take him to the level he did.
“The No. 8 is reserved and ready for Brexton Busch when he is ready to compete in NASCAR races.”
Brexton, 11, has been a promising runner for some time now. In recent years, Kyle had spent much of his own racing season following Brexton during the week.
NASCAR Cup Series driver Kyle Busch and his wife Samantha stand before the start of the 1000Bulbs.com 500 at Talladega Superspeedway in Talladega, Alabama on October 14, 2018. (Jasen Vinlove/USA TODAY Sports)
Samantha Busch is one of the most active drivers’ wives on social media and has spent several years documenting the racing lives of Kyle and Brexton.
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Earlier this year, Brexton faced his father for the first time at the Tulsa Shootout.
The age limit for racing in the NASCAR Cup Series is 18 years old. Brexton would, however, be eligible to race in the Truck Series at age 16.
