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New details emerge about Kyle Busch’s health prior to NASCAR legend’s death: Report

More details have been unearthed pertaining to the health of Kyle Busch prior to the NASCAR legend’s sudden death last week.

According to a report from The Athletic on Wednesday, Busch had bacterial pneumonia for “days to weeks” before he died at age 41 in a Charlotte hospital on May 21. The report cited a copy of his death certificate.

The pneumonia eventually progressed into sepsis. That then led to disseminated intravascular coagulation (DIC), which causes abnormal clotting throughout blood vessels in the body, the report said, which all led to hemorrhagic shock.

The report also states that Busch’s body was cremated in Mooresville.

A memorial for Kyle Busch is displayed at Charlotte Motor Speedway Sunday, May 24, 2024 during the Coca Cola 600.
A memorial for Kyle Busch is displayed at Charlotte Motor Speedway Sunday, May 24, 2024 during the Coca Cola 600. TRACY KIMBALL tkimball@charlotteobserver.com

Such details paint a more vivid picture of what led to Busch’s death last week and aligns with what has surfaced to date. That includes what the family shared in a statement on Saturday morning — that severe pneumonia devolved into sepsis, “resulting in rapid and overwhelming associated complications.”

According to the Centers for Disease Control and Prevention, sepsis is the body’s extreme response to an infection. It is a “life-threatening medical emergency” and happens when an infection you already have causes “a chain reaction throughout your body.”

Emergency calls obtained by The Charlotte Observer also corroborates The Athletic’s report. The 911 calls illustrate what was happening inside GM Charlotte Technical Center the day the 41-year-old driver reportedly fell ill in a Concord racing simulator. One man said the ill person was “coughing up some blood” and said he looked like “he’s going to pass out” at 5:32 p.m. Wednesday. Another caller added that the person was awake on the bathroom floor with shortness of breath and was “very hot.”

The fact that Busch had pneumonia for “days and weeks” leading up to his death had also been rumored. Busch reported to his team during a race at Watkins Glen that he wasn’t feeling well and asked his doctor to give him “a shot” after he finished the race. The broadcast said that he’d been struggling with a sinus infection.

NASCAR Cup Series driver Kyle Busch during Media Day at Daytona International Speedway in Daytona Beach, FL. on Wednesday, February 12, 2020.
NASCAR Cup Series driver Kyle Busch during Media Day at Daytona International Speedway in Daytona Beach, FL. on Wednesday, February 12, 2020. Jeff Siner jsiner@charlotteobserver.com

Other drivers had noticed that he was sick prior to his passing. When asked if he noticed Busch not feeling well at all in his interactions with him the last two weeks this past weekend at Charlotte Motor Speedway, Brad Keselowski said, “Yes.”

“I won’t go into any specifics,” Keselowski said. “But then when he ran the truck race, what was it, Friday of last week? Those were honestly kind of erased in my mind.”

Busch won the Truck Series race in Dover — the last race win of his decorated career — before running in the NASCAR All-Star Race later that weekend.

“I’m not any level of doctor, but I do know the workload associated with running a double-duty weekend pretty well, having done it myself,” said Keselowski, a longtime contemporary and competitor of Busch. “And he obviously executed at a very high level, winning one of the races. So I kind of was very dismissive of that.”

Busch won an all-time most 234 wins across all three NASCAR national series, a ninth-most 63 Cup wins and two Cup championships. He is survived by his wife, Samantha; his son and favorite driver, Brexton; his daughter, Lennix; his Hall of Fame brother, Kurt; his parents, Tom and Gaye; and his teammates and friends.

His family made their first public appearance this weekend at Charlotte Motor Speedway, mere days after the tragedy. NASCAR CEO Steve O’Donnell spoke to the bereaved crowd.

“Kyle Busch is NASCAR,” O’Donnell said. “He was one of a kind. There will never be another.”

Samantha Busch (wife) and Brexton Busch (son) embrace one another on the grid during the remembrance ceremony for Kyle Busch, who passed away suddenly at the age of 41, prior to the NASCAR Cup Series Coca-Cola 600 at Charlotte Motor Speedway on May 24, 2026 in Concord, North Carolina.
Samantha Busch (wife) and Brexton Busch (son) embrace one another on the grid during the remembrance ceremony for Kyle Busch, who passed away suddenly at the age of 41, prior to the NASCAR Cup Series Coca-Cola 600 at Charlotte Motor Speedway on May 24, 2026 in Concord, North Carolina. Jonathan Bachman Getty Images

This story was originally published May 27, 2026 at 5:28 PM with the headline "New details emerge about Kyle Busch’s health prior to NASCAR legend’s death: Report."

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Alex Zietlow
The Charlotte Observer
Alex Zietlow writes about the Carolina Panthers and the ways in which sports intersect with life for The Charlotte Observer, where he has been a reporter since August 2022. Zietlow’s work has been honored by the Pro Football Writers Association, the N.C. and S.C. Press Associations, as well as the Associated Press Sports Editors (APSE) group. He’s earned six APSE Top 10 distinctions for his coverage on a variety of topics, from billion-dollar stadium renovations to the small moments of triumph that helped a Panthers kicker defy the steepest odds in sports. Zietlow previously wrote for The Herald in Rock Hill (S.C.) from 2019-22. Support my work with a digital subscription
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