Mezue ahịrịokwu a: N'egwuregwu Olimpik nke afọ 2012 e mere na Lọndọn, Grevers nwetara ihe nrite atọ: ọlaedo abụọ na ọlaọcha otu. Grevers nwetara ihe nrite mbụ ya, ọlaọcha, site n'isoro ndị òtù egwuregwu United States nke nọ n'ọnọdụ nke abụọ n'asọmpi mbụ nke ịgba ọsọ 4×100 mita n'ụdị e ji agba ọsọ. Na ngwụcha egwuregwu ahụ, ndị Amerịka bịara nke abụọ n'azụ ndị Frans. N'iso Jimmy Feigen, Ricky Berens, na Jason Lezak na-egwu mmiri, Grevers gbara ọsọ nke abụọ ma dekọọ oge nke 47.59. Mgbe o duru ndị na-agba ọsọ (52.92) na ọkara-ikpeazụ (52.66) nke 100 mita azụ, Grevers meriri ọlaedo na njedebe nke 100 mita azụ na oge nke 52.16, na-eme ka Aaron Peirsol's Olympic ndekọ nke 52.54 setịpụrụ na 2008 na 0.76 sekọnd n'ihu Nick Thoman. Nye Grevers, ọ bụ nrite ọlaedo mbụ ya. N'asọmpi ikpeazụ ya,
4×100-meter medley relay, Grevers meriri ọlaedo na Brendan Hansen, Michael Phelps na Nathan Adrian. N'ịgba ọsọ azụ, Grevers dekọrọ oge nke 52.58 sekọnd, ndị otu United States wee merie na oge nke 3:29.35.