Busch, a five-time winner at the track, led 218 of the first 301 laps.
MORE: Bristol race weekend images
On Lap 190, though, NBC reported that Busch had told his team that he had a headache.
“He radioed in and said, ‘Next time in, guys, give me a bottle of water with some Goodies headache powder in it. I’ve got a pretty bad headache right now,” the network reported during the broadcast.
Busch and his Joe Gibbs Racing teammates have been strong at Bristol all week. They qualified in the top three positions for the race then Busch dominated the first half of the race.
On Lap 320, while back in the lead after surrendering it to Kevin Harvick for a few laps, Busch radioed his team that he thought he had an issue with his car, but he continued to hold off the field.
