Dhameystir weedha soo socota: Ciyaaraha Olombikada ee London 2012, Grevers wuxuu ku guuleystay seddex billadood: laba dahab iyo hal lacag. Grevers wuxuu kasbaday billadkiisii ugu horreysay, oo ah billad qalin ah, isagoo ku dabaalanaya kooxda Mareykanka ee kaalinta labaad ka gashay heerarka hordhaca ah ee 4 × 100 mitir ee dabaasha xorta ah. Finalka, kooxda Mareykanka ayaa kaalinta labaad ka gashay Faransiiska. Isaga oo la shaqeynaya Jimmy Feigen, Ricky Berens, iyo Jason Lezak oo ku jira kuleylka, Grevers ayaa dabaashay lugta labaad waxayna diiwaan gelisay waqti 47.59. Ka dib markii uu hogaaminayay wareega (52.92) iyo semi-finalka (52.66) ee
100 mitir oo dhabarka ah, Grevers wuxuu ku guuleystay dahabka finalka 100 mitir ee dhabarka isagoo leh waqti dhan 52.16, isagoo ka fiicnaaday Aaron Peirsol rikoodhkiisa Olombikada ee 52.54 oo la dhigay 2008 iyo 0.76 ilbiriqsi oo ka horreeya Nick Thoman. Grevers, waxay ahayd billaddii ugu horeysay ee dahab shaqsi ah. Dhacdadii ugu dambeysay, 4 × 100 mitir oo isku dhafan, Grevers wuxuu ku guuleystay dahab Brendan Hansen, Michael Phelps iyo Nathan Adrian. Markii uu dabaal ku galay lugta dhabarka, Grevers wuxuu diiwaan geliyay waqti 52.58 ilbiriqsi ah, kooxda Mareykanka waxay ku guuleysteen waqti 3:29.35.