 Pamakwikwi e2012 United States Olympic Trials muOmaha, Nebraska, mumakwikwi eOlympic a2012, Larson akaita chikwata cheU.S. chemaOlympic kekutanga nekukunda 100 metres breaststroke nenguva ye1:05.92, pamberi peanofarira Rebecca Soni. Mumitambo yeOlympic yeZhizha ya2012 muLondon, akawana menduru yegoridhe nokushambira chikwata cheU.S. chakahwina mumatanho okutanga e4 × 100 metres medley relay. Panhangemutange yokupedzisira yemamita 100, Larson akatanga zvisina kururama. Zvisinei, kwakaratidzwa kuti paiva nechinetso chezvokugadzira uye akabvumirwa kukwikwidza. Akapedza ari panzvimbo yechitanhatu. 