Kyle Busch. Matthew O'Haren-Imagn Images

Cause of death revealed for Kyle Busch

Originally posted on Larry Brown Sports | By Grey Papke | Last updated May 23, 2026 1:51 PM ET

Kyle Busch’s cause of death has been revealed in a statement from his family.

In the statement released Saturday, Busch’s family announced that the NASCAR driver died after “severe pneumonia progressed into sepsis, resulting in rapid and overwhelming associated complications.” The statement asked for continued privacy for the family.

Sepsis is described by the Centers for Disease Control as the body’s extreme response to an infection.

The infection triggers a chain reaction throughout the body.

Just received a statement from Kyle Busch's family on the cause of his death:

"The medical evaluation provided to the Busch Family concluded that severe pneumonia progressed into sepsis, resulting in rapid and overwhelming associated complications.

"The Family asks for…
— Jeff Gluck (@jeff_gluck) May 23, 2026

Busch had complained of an illness and a persistent cough at his final race at Watkins Glen last Sunday. Audio of a 911 call later revealed that Busch was coughing up blood and suffering from shortness of breath before being hospitalized on Wednesday, one day before his death.

The 41-year-old had been testing out a Chevrolet simulator on Wednesday in Concord, N.C., when he became unresponsive. He died the next day, prompting an outpouring of tributes across the racing world.

Busch had two NASCAR Cup Series championships and a total of 234 victories across the three divisions, which is a record.

This article first appeared on Larry Brown Sports and was syndicated with permission.

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