 On June 24, 2012, akapedza 4th muna 400 metres pa 2012 United States Olympic Trials, mhedzisiro yakamupa nzvimbo muchikwata cheUnited States cheOlympic senhengo ye4x400 relay. PaOlympics, Mance akanga ari rutivi rwechikwata cheAmerica chisina chokwadi chakahwina menduru yesirivha. Mumakwikwi e semi-finals, Mance akatora baton kubva kuna Manteo Mitchell mushure mekunge Mitchell apedza hafu yedenderedzwa neyakazove gumbo rakatyoka. Mance akabatsira kudhonza chikwata kudzokera panzvimbo kuti chikwanise kuenda kumagumo. Mumutambo wokupedzisira, chikwata cheBahamas chakakunda chakarova chikwata chavo, chichiisa chakanakisisa chavo, Chris Brown munhanho inotungamirira. Rutsoka rwechipiri rwaMance rwakaita kuti U.S. irwisane nepo zvikwata zviviri zvacho zvakabva panhandare. Mance akapfuudza kuna Tony McQuay uyo akamhanya 43.4 kupatsanura kunoshamisa kuti atungamirire. Munotsiva waMitchell, mutambi anotamba nemipingamupinyi Angelo Taylor akadonhedzwa mumamita 50 okupedzisira naRamon Miller kuti Bahamas ikunde. 