“Kyle Busch died after severe pneumonia progressed into sepsis, resulting in rapid and overwhelming associated complications, according to a statement released by his family.”

“Dakota Hunter, vice president of Kyle Busch Companies, said in a news release the family received the medical evaluation on Saturday.”

“Busch, a two-time NASCAR champion, died at 41 on Thursday, a day after passing out in a Chevrolet simulator.”

“Busch was thought to have had a sinus cold while racing at Watkins Glen on May 10 and radioed in to his team saying that he needed a "shot" from a doctor after the race.”

“However, he bounced back to win the Trucks Series race at Dover last weekend, and then he finished 17th in the All-Star race on Sunday.”

“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 on Wednesday when he became unresponsive and was transported to a hospital in Charlotte”

“During the emergency call placed late that afternoon, an unidentified caller calmly told the dispatch: "I've got an individual that's (got) shortness of breath, very hot, thinks he's going to pass out, and is producing a little bit of blood, coughing up some blood."”

“The caller said Busch was lying on the bathroom floor inside the complex and told dispatch "he is awake," according to audio provided by the Cabarrus County Sheriff's Office.”

“Busch won 234 races across NASCAR's top three series over his two-decade career, more than any driver in history.”