Akakunda menduru yebronze pamakwikwi emamita 100 ekumhanya achishandisa butterfly pamitambo yeOlympic yakaitwa kuRio muna 2016
nenguva ye56.63. Vollmer akakwikwidzawo mumakwikwi e4×100-meter freestyle relay usiku humwe chete, umo akashambira gumbo rechitatu nekuparadzaniswa kwe53.18. Chikwata cheU.S. chake, Simone Manuel, Abbey Weitzeil, naKatie Ledecky vakakunda sirivha nenguva yeAmerican rekodhi ye3:31.89. Akashambirawo mumakwikwi e4 x 100 metres medley relay, achibatsira chikwata cheU.S. kuhwina menduru yegoridhe. Ndarama yake mumutambo we medley relay yakanga iri menduru yegoridhe yechi1000 yeUnited States kumaOlympics ezhizha.