Rubuta ci gaba ga wannan sakin layi - A cikin prelims zafi na 4x100 mita medley relay
a rana ta bakwai, Pieroni ya yi iyo a sashin 'yanci na relay, yana taimakawa relay wanda ya kunshi shi, Hunter Armstrong, Andrew Wilson, da Tom Shields, sun gama na bakwai gaba daya kuma sun ci gaba zuwa wasan karshe. A ranar karshe ta gasar, tseren karshe ya kasance na farko kuma dukkan mambobin tseren farko da tseren karshe sun lashe lambar zinare don kokarin su.