Kyle Busch's wife Samantha Busch is "beyond shattered" that the NASCAR legend is not alive to see their son's race win at Oklahoma’s Port City Raceway dirt track. It read: "The medical evaluation provided to the Busch Family concluded that severe pneumonia progressed into sepsis, resulting in rapid and overwhelming associated complications." A statement from NASCAR, the Busch family and his Richard Childress Racing team read: "On behalf of the Busch family, everyone at Richard Childress Racing and all of NASCAR, we are devastated to announce the sudden and tragic passing of Kyle Busch. "Our entire NASCAR family is heartbroken by the loss of Kyle Busch. The statement concluded: "Our thoughts are with Samantha, Brexton and Lennix, Kyle and Samantha’s parents, Kurt and all of Kyle’s family, Richard and Judy Childress, everyone at Richard Childress Racing, his teammates, friends and fans.