Leigh Diffey

Leigh Diffey (born 3 March 1971) is an Australian-American auto racing and track and field commentator. He is best known for being the lead play-by-play announcer for much of NBC Sports' motorsports coverage, currently calling NASCAR Cup Series on USA Sports, IMSA sports car races for the network and AMA Supercross. Before this, he was the lead voice of NBC's Formula One and IndyCar Series coverage. Diffey has also worked play-by-play for NBC's coverage of the Summer and Winter Olympic Games, most notably becoming the network's lead track and field sportscaster prior to the 2020 Summer Olympics in Tokyo, Japan.

Diffey's broadcasting career began by calling motorcycle races in his home country. His career has included stints with Network Ten in Australia and the BBC in the United Kingdom covering various forms of motorsport. In the United States, Diffey joined Speed Channel in 2003 before moving to NBC when Formula One's US television rights were transferred to the network in 2013.