Summer McIntosh BLITZES to 400m freestyle American Record at Toyota US Open | NBC Sports

Canada's Summer McIntosh was one of just two non-Americans in the 400m freestyle Final C field, where she jumped out to a strong lead early and held it as she powered to an American record. #NBCSports #Swimming #SummerMcIntosh » 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 fans 24/7 w...