Regan Smith wins 100m butterfly SHOWDOWN with fellow American Summer McIntosh | NBC Sports

American star Regan Smith won the 100-meter butterfly in Austin with a time of 56.18 seconds, holding off fellow American Summer McIntosh (58.56) and French swimmer Marie Wattel (59.58) to secure the victory. #NBCSports #Swimming #ReganSmith » Subscribe to NBC Sports: https://www.youtube.com/nbcsports?sub_confirmation=1 » Watch Live Sports on Peacock: https://peacocktv.smart.link/v82e9dl56 NBC Sports Group serves spo...