Mezue ahịrịokwu na-esonụ: Na 2012 Summer Olympics na London, Beisel dere oge nke 4:31.68 na preliminaries nke
Ngwakọta nke mmadụ n'otu n'otu na mita 400. A họpụtara ya ka ọ bụrụ onye mbụ na-aga n'ikpeazụ, wee nata ọlaọcha ọlaọcha maka ịmecha nke abụọ n'azụ Ye Shiwen nke China na oge nke 4:31.27 na Ye's 4:28.46. O nwetakwara nrite ọla nchara site na itinye nke atọ na 200 mita azụ na oge nke 2:06.55, n'azụ American Missy Franklin na Russian Anastasia Zuyeva.