Two-time NASCAR Cup Series champion Kyle Busch died from complications of severe pneumonia that progressed into sepsis, his family announced on Saturday.

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

Kyle Busch, a two-time Cup Series champion who won more races than anyone across NASCAR’s three national series, has died. He was 41.

Busch, a two-time NASCAR champion, died at 41 on Thursday

Kyle Busch died after severe pneumonia progressed into sepsis, leading to rapid complications.