Gretchen Walsh DOMINATES 100m butterfly for first win at Toyota US Open in Austin | NBC Sports

Olympic stars Gretchen Walsh and Regan Smith faced off in the 100m butterfly after both being held winless on Day 1, but Walsh finally broke the seal at the US Open and earned her first win in Championship-record style. #NBCSports #Swimming #GretchenWalsh » Subscribe to NBC Sports: https://www.youtube.com/nbcsports?sub_confirmation=1 » Watch Live Sports on Peacock: https://peacocktv.smart.link/v82e9dl56 NBC Sports Gr...