Ramba uchinyora ndima ino - Pamakwikwi eOlympic eZhizha a2012 muLondon, Grevers akawana menduru nhatu: mbiri dzendarama neimwe yesirivha. Grevers akawana menduru yake yokutanga, sirivha, nokushambira nokuda kweboka reU.S. rakava panzvimbo yechipiri mumatanho okutanga e4×100-metre freestyle relay. Mumutambo wokupedzisira, chikwata cheAmerica chakapedza chiri chechipiri pashure peFrance. Achibatsirana naJimmy Feigen, Ricky Berens, naJason Lezak mumakwikwi okutanga, Grevers akahwina muchikamu chechipiri ndokunyora nguva ye47.59. Pashure pokutungamirira mumakwikwi (52.92) uye mumasemi-fainari (52.66) emamita 100 kumusana
, Grevers akahwina goridhe mumakwikwi ekupedzisira emamita zana ekumashure nenguva ye52.16, achivandudza rekodhi yaAaron Peirsol yeOlympic ye52.54 yakaiswa muna2008 uye 0.76 masekondi pamberi paNick Thoman. Nokuda kwaGrevers, yakanga iri menduru yake yokutanga yegoridhe yomunhu oga. Mumutambo wake wokupedzisira, 4×100-metre medley relay, Grevers akakunda ndarama naBrendan Hansen, Michael Phelps naNathan Adrian. Achishambira nhano yokushambira shure, Grevers akarekodha nguva yemasekonzi 52.58, uye chikwata cheU.S. chakaenderera mberi kukunda nenguva ya3:29.35.