Gretchen Walsh was more than a half-second under world-record pace at the turn and finished strong to eclipse the 100m fly mark of 55.48 set by Sweden's Sarah Sjöström at the 2016 Rio de Janeiro Olympics....
Gretchen Walsh was more than a half-second under world-record pace at the turn and finished strong to eclipse the 100m fly mark of 55.48 set by Sweden's Sarah Sjöström at the 2016 Rio de Janeiro Olympics....