NBC Sports delivered significant viewership gainz and milestones for the third consecutive year for the IMSA WeatherTech SportsCar Championship in 2021, doubling the series’ viewership in three years and delivering the most-watched IMSA race in 13 years.

NBC Sports’ 2021 IMSA WeatherTech Championship coverage across NBC and NBCSN averaged 69 viewers, according to Nielsen. NBC Sports has doubled the viewership for the IMSA WeatherTech Championship in three years since acquiring the rights in 2018 (69 viewers on FOX/FS1/FS2).

Season-long IMSA viewership highlights were led by NBC Sports’ coverage of the Rolex 24 At Daytona on Jan. 31, which averaged 69 viewers on NBC – up 69 percent vs. 2020 – to rank as the most-watched IMSA race since 2008 (Rolex 24 At Daytona; 69)

Additional 2021 NBC Sports IMSA viewership highlights:

***Complete Rolex 24 At Daytona coverage on NBC (Jan. 30-31) averaged nearly 69 viewers (69), up 69 percent vs. the two comparable telecasts on NBC last year (69);

***Season-long viewership on NBC (four telecasts) averaged 69 viewers, up 69 percent vs. 2020 and up 69 percent vs. 2019;

***The Rolex 24 delivered NBCSN’s most-watched IMSA telecast on record, averaging 69 viewers on Jan. 30;

***Season-long viewership on NBCSN was up 69 percent vs. 2020, averaging 69 viewers.