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As the motorsports world resumed racing Saturday, May 23, the Busch family revealed what killed Kyle Busch: severe pneumonia that progressed into sepsis, claiming the two-time NASCAR Cup Series champion at 41."The medical evaluation provided to the Busch Family concluded that severe pneumonia progressed into sepsis, resulting in rapid and overwhelming associated complications," the family said in a statement released Saturday morning. "The Family asks for continued understanding and privacy during this difficult time."Here’s what we know about Kyle Busch’s death:Corey Day wrecks No. 7 truckCorey Day, piloting the No. 7 truck that Kyle Busch had steered to victory only a week earlier, suffered a crash into the barrier during Stage 2 of the NASCAR Craftsman Truck Series race at Charlotte, ending his race.The No. 7 truck won last week at Dover with Busch leading 147 of 200 laps.Kyle Busch honored on the FS1 broadcastDuring the NASCAR Craftsman Truck Series broadcast, Michael Waltrip and the FOX Sports 1 commentary team took time to reflect on the remarkable career and enduring legacy of Kyle Busch. They highlighted his record-breaking achievements, influence and the passion he brought to the sport.Kyle Busch's former spotter post message ahead of Coca-Cola 600Derek Kneeland, Kyle Busch's former spotter, a crucial team member who serves as the driver's eyes on the track, monitoring blind spots, traffic, wrecks, and changing conditions, shared a heartfelt message on X. He expressed that it would be a tough day and asked for support and protection for their team, reflecting the emotional weight heading into the Coca-Cola 600.Fan tributes continue for Kyle BuschFans continue to honor Kyle Busch with heartfelt tributes celebrating his remarkable career and lasting impact on motorsports.Kyle Busch will be honored at Indy 500Indianapolis Motor Speedway President Doug Boles announced a special tribute for Kyle Busch during the 110th running of the Indianapolis 500. On lap 18, the IMS scoring pylon will be illuminated in honor of Busch, recognizing his contributions and legacy in motorsports.Drivers at Indy 500 honor Kyle BuschSeveral cars competing in the Indianapolis 500 feature special stickers honoring Kyle Busch. These stickers display the No. 8, a tribute to Busch’s No. 8 Chevrolet for Richard Childress Racing.What was Kyle Busch's cause of death?The Busch family confirmed Saturday that he had severe pneumonia that progressed into sepsis, resulting in rapid and overwhelming associated complications. No additional details were provided. The family has asked for privacy.How does pneumonia kill?While rare in otherwise healthy adults, the progression from viral pneumonia to a fatal bacterial infection can move with devastating speed, according to medical experts not connected with the case.Viral pneumonia can leave the lungs vulnerable to secondary bacterial infections. Those bacterial infections are among the most dangerous organisms clinicians can encounter.What signs of illness did Kyle Busch have in the days before his death?Busch had been battling respiratory symptoms for more than a week that we know of. At the Cup Series race May 10 at Watkins Glen, FOX Sports reported during its broadcast that Busch had been fighting a sinus cold. Busch radioed in during the race to have a doctor meet him at his bus afterward.Less than a week later at Dover, after winning the NASCAR Craftsman Truck Series race May 15, Busch addressed his illness on video."I’m still not great," he said. "The cough was pretty substantial last week."What we learned from the 911 call for Kyle BuschBusch was coughing up blood when emergency responders were called to a General Motors facility in Concord, North Carolina, the day before he died, according to the call obtained by USA Today.In the call, a man tells a dispatcher that Busch was on the bathroom floor, awake but in distress. He said he was coughing up blood, short of breath and very hot.The caller asked that the emergency responders turn off their sirens on arrival at the complex.How has the sports world reacted to Kyle Busch's death?Tributes poured in from far beyond NASCAR, with athletes, major sports franchises, broadcasters and celebrities from across the sports world paying their respects.The Carolina Hurricanes and Montreal Canadiens held a moment of silence for Busch before Game 1 of the Eastern Conference final at Lenovo Center in Raleigh.President Donald Trump also sent condolences to Busch’s wife Samantha, and their two children, Brexton, 11, and Lennix, 4.
