Tyler Calegan has finished second and fourth the past two years in the butterfly .
Greenwald - who placed in two individual events last year - was the only swimmer to break a minute in the breaststroke at the district meet .
Tyler Calegan has finished second and fourth the past two years in the butterfly , while Greenwald - who placed in two individual events last year - was the only swimmer to break a minute in the breaststroke at the district meet .