Kate Douglass and Gretchen Walsh put on a 50m freestyle battle for the ages, where Douglass finished victorious and with a surprise world record at the TYR Pro Swim Series in Indianapolis. #NBCSports #KateDouglass #GretchenWalsh #Swimming #TYRProSwim » Subscribe to NBC Sports: youtube.com/nbcsports?sub_confirmation=1 » Watch Live Sports on Peacock: peacocktv.smart.link/v82e9dl56 NBC Sports Group serves sports fans 24/7 with premier live events, insightful studio shows, and compelling original programming. NBC Sports is an established leader in the sports media landscape with an unparalleled collection of sports properties that include the Olympics, NFL, Premier League, Big Ten, NASCAR, PGA TOUR, the Kentucky Derby, Tour de France and many more. Subscribe to our channel for the latest sporting news and highlights! NBC Olympics is responsible for producing, programming and promoting NBCUniversal's Olympic coverage. It is renowned for its unsurpassed Olympic her...