Kyle Busch's cause of death revealed by family
Kyle Busch, who won more races in NASCAR's top three series than anyone in history, died suddenly on Thursday.
Updated on: May 23, 2026 / 1:04 PM EDT / CBS/AP
NASCAR star Kyle Busch died from severe pneumonia that progressed into sepsis, according to a statement released Saturday by his family.
"The medical evaluation provided to the Busch Family concluded that severe pneumonia progressed into sepsis, resulting in rapid and overwhelming associated complications," according to the statement from the Busch family.
Sepsis is a life-threatening medical condition that occurs when the body has an extreme response to an infection, causing damage to tissues and organs, according to the Centers for Disease Control and Prevention.
This was the Busch family's first statement since Thursday, when they wrote on social media that he "experienced a severe illness resulting in hospitalization" and would miss this weekend's Coca-Cola 600, one of the biggest races of the season.