De Beer so na ndị otu South Africa n'egwuregwu Olimpik nke afọ 2012 n'asọmpi ọsọ mita 4 x 400
ọkara-ikpeazụ, ebe ọ ga-agba ọsọ ikpeazụ. N'agba nke abụọ, Ofentse Mogawane na onye Kenya bụ Vincent Mumo Kiilu kụkasịrị, nke mere ka South Africa pụọ n'ọsọ ahụ. A gafere South Africa n'asọmpi ikpeazụ ahụ mgbe ha rịọrọ ndị IAAF arịrịọ, n'ihi nnyonye anya nke onye egwuregwu Kenya nke meriri Mogawane. E kenyere ha okporo ụzọ nke itoolu. Ọ gbara ọsọ nke abụọ n'asọmpi ikpeazụ nke South Africa gbara onye nke asatọ.