NASCAR driver Kyle Busch passed away after severe pneumonia progressed into sepsis, leading to rapid and overwhelming complications. His family confirmed the cause of death.

<img alt="A male NASCAR driver wearing sunglasses stands near a track during the day." height="349" src="https://i.cbc.ca/ais/ca2b2fc6-168e-486c-baa1-5491259eaba9,1779558209474/full/max/0/default.jpg?im=Crop%2Crect%3D%280%2C202%2C4927%2C2771%29%3BResize%3D%28620%29" title="Kyle Busch, who was preparing to race Sunday at the Coca-Cola 600 at Charlotte Motor Speedway, was testing in the Chevrolet racing simulator in Concord, N.C., on Wednesday when he became unresponsive and was transported to a h...