Kammala jumla mai zuwa: A rana ta bakwai, ya yi iyo a baya na raga na raga a cikin prelims na
4x100 mita medley relay, ci gaba da relay zuwa karshe tare da sauran relay teammates Andrew Wilson, Tom Shields, da kuma Blake Pieroni. A ranar karshe ta gasar, wasan karshe ya kammala na farko kuma dukkan 'yan wasan daga wasan farko da na karshe ciki har da Armstrong sun lashe lambar zinare a gasar.