Uploaded June 2026 | Updated September 2026, 3 weeks ago
Leigh Diffey is one of the most prolific voices in motorsports, serving as NBC Sports’ lead play-by-play commentator for its NASCAR Cup Series, IMSA WeatherTech Sportscar Championship, and Supercross coverage. In addition, he is NBC Olympics’ primary announcer for Track & Field and has called numerous events at both the Summer and Winter Games.
Following Diffey’s role as lead play-by-play commentator for Track & Field at the Paris Olympics, he was named NBC Sports’ lead NASCAR Cup Series play-by-play commentator ahead of the August 24 race at Daytona International Speedway in primetime on NBC and Peacock. He served as NBC Sports’ lead INDYCAR commentator for more than a decade, including all six of NBC Sports’ Indianapolis 500 broadcasts, and has handled play-by-play for nearly every major motorsport series, including NASCAR, Formula One, IMSA, Supercross, and MotoGP.
Leigh Diffey is one of the most prolific voices in motorsports, serving as NBC Sports’ lead play-by-play commentator for its NASCAR Cup Series, IMSA WeatherTech Sportscar Championship, and Supercross coverage. In addition, he is NBC Olympics’ primary announcer for Track & Field and has called numerous events at both the Summer and Winter Games.
Following Diffey’s role as lead play-by-play commentator for Track & Field at the Paris Olympics, he was named NBC Sports’ lead NASCAR Cup Series play-by-play commentator ahead of the August 24 race at Daytona International Speedway in primetime on NBC and Peacock. He served as NBC Sports’ lead INDYCAR commentator for more than a decade, including all six of NBC Sports’ Indianapolis 500 broadcasts, and has handled play-by-play for nearly every major motorsport series, including NASCAR, Formula One, IMSA, Supercross, and MotoGP.
