On 3 July, Jimmie Johnson reported that he had tested positive for COVID-19 (the first NASCAR driver to do so), requiring him to use Justin Allgaier as a substitute driver for that weekend's Big Machine Hand Sanitizer 400. That turned out to be crucial, as Johnson, who had been scheduled to start sixth, would miss the playoff cut by six points.[103] Johnson was asymptomatic, and was cleared on 8 July after two further tests came back negative.[104] On 15 August, Austin Dillon became the second Cup Series driver to reveal a positive test, and as a result he missed the Daytona Grand Prix. Unlike Johnson, Dillon had already secured a playoff spot by winning the O'Reilly Auto Parts 500 at Texas the month before.[105]