Cika wannan jumla: A cikin prelims zafi na
4x100-mita medley relay a rana ta bakwai, Pieroni ya yi iyo a cikin freestyle na relay, yana taimaka wa relay wanda ya kunshi shi, Hunter Armstrong, Andrew Wilson, da Tom Shields, sun gama na bakwai gaba ɗaya 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.