USA's Gretchen Walsh DOMINATES 50m butterfly once again in Toronto World Cup | NBC Sports

As she has many times before, American Gretchen Walsh impressed in a big way throughout the women's 50m butterfly, where she finished with a time of 23.91 to come out on top at the Toronto World Cup. #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 Group serves sports fa...