NASCAR driver Kyle Busch died of severe pneumonia and sepsis, his family announced on Saturday, two days after his sudden death shocked racing fans.

Kyle Busch, who won more races than anyone across NASCAR's three national series, has died at 41. A joint statement from the Busch Family, Richard Childress Racing and NASCAR said…

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

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

NASCAR driver Kyle Busch died Thursday at age 41