Tony Stewart has been feeling under the weather all day. He received two IVs before the Coke Zero 400 from Daytona International Speedway to rehydrate, and managed to start the race in the Joe Gibbs Racing No. 20.
But under caution at 72, Stewart climbed out of the car, and J.J. Yeley climbed in.
Stewart is being treated at the infield care center for flu-like symptoms.