Ka cika wannan magana: A Wasannin Olympics na 2012 a Landan, Grevers ya lashe lambar yabo uku: zinare biyu da azurfa ɗaya. Grevers ya sami lambar yabo ta farko, ta azurfa, ta hanyar yin iyo don ƙungiyar Amurka ta biyu a cikin zafin jiki na farko na tseren mita 4 × 100. A wasan karshe, tawagar Amurka ta zama ta biyu a bayan Faransa. Haɗuwa tare da Jimmy Feigen, Ricky Berens, da Jason Lezak a cikin zafi, Grevers ya yi iyo na biyu kuma ya rubuta lokaci na 47.59. Bayan jagorantar zagaye na zagaye (52.92) da kuma wasan kusa da na karshe (52.66) na
A tseren mita 100 a baya, Grevers ya lashe zinare a wasan karshe na tseren mita 100 a baya tare da lokacin 52.16, ya inganta rikodin wasannin Olympic na Aaron Peirsol na 52.54 da aka kafa a 2008 kuma da sakan 0.76 a gaban Nick Thoman. Ga Grevers, shi ne na farko mutum zinare. A cikin taron sa na ƙarshe, tseren mita 4 × 100, Grevers ya lashe zinare tare da Brendan Hansen, Michael Phelps da Nathan Adrian. Yin iyo a baya, Grevers ya rubuta lokaci na 52.58 seconds, kuma tawagar Amurka ta ci gaba da cin nasara tare da lokaci na 3: 29.35.