The NASCAR legend’s family said Saturday that he died of severe pneumonia that progressed into sepsis.

Kyle Busch's family earlier Thursday announced he had been hospitalized with a "severe illness."

NASCAR legend Kyle Busch has passed away at 41. The two-time Cup Series champion was a record-breaking driver. Busch was hospitalized earlier due to a severe illness. His passing…

The race car driver was hospitalized earlier in the day due to a "severe" illness, according to a statement from his family.