NASCAR star Kyle Busch was 'unresponsive in racing simulator' before tragic death NASCAR star Kyle Busch was 'unresponsive' in a racing simulator before being hospitalized and later dying before Sunday's Coca-Cola 600 in Charlotte. NASCAR star Kyle Busch was “unresponsive” in a Chevrolet racing simulator before being hospitalized with a “severe illness” and later dying at the age of 41. The Richard Childress Racing star was preparing ahead of this weekend’s Coca-Cola 600 when he fell ill, with his passing coming less than a week after he scored his 234th and final NASCAR win at Dover. The Busch Family, RCR, and NASCAR all released statements early on Thursday confirming that Busch was in the hospital and would miss the Coca-Cola 600 due to “severe illness,” with Austin Hill being drafted into the No. 8 as cover. However, hours later, it was confirmed that Busch had died, sending the NASCAR world into mourning. Busch’s official cause of death has yet to be confirmed. It comes after two-time Cup Series champion Busch sparked concern at Watkins Glen earlier this month when he demanded to see a doctor mid-race. - Kyle Busch LIVE: Updates and tributes as NASCAR world shocked by news of death at 41 - Kyle Busch's eerie words after last NASCAR win just days before tragic death According to AP, Busch was found “unresponsive” in a Chevrolet racing simulator in Concord, North Carolina, before being rushed to the hospital on Wednesday. Busch was believed to be dealing with a sinus infection during the May 10 race at Watkins Glen International. During the event, he radioed his team requesting a “shot” from a doctor once the race concluded. According to the broadcast, the condition was aggravated by the track’s heavy G-forces and elevation changes. However, it remains unclear whether the illness