Whakaotihia te rerenga e whai ake nei: I te Pipiri 24, 2012, i mutu ia i te 4th i roto i te 400 mita i te 2012 United States Olympic Trials, he hua i riro ia ia he tūranga i runga i te United States Olympic kapa hei mema o te 4x400 relay.
I ngā Orimipia, he mema a Mance o te kapa hiriwa o Amerika i wikitōria. I roto i nga whiringa toa, i tangohia e Mance te tokotoko mai i a Manteo Mitchell i muri i te otinga o te hawhe a Mitchell i te mea i pakaru te waewae. I āwhina a Mance ki te whakahoki i te kapa ki te tūranga kia eke ki te whiringa toa. I te whiringa toa, ka whakakotahihia e te kapa toa o Bahamas a raatau kapa, ka whakanoho i a raatau tino pai, ko Chris Brown i te waewae rangatira. Ko te whutupaoro tuarua a Mance i whakauruhia ai te US ki te whakataetae i te wa i wehe atu ai nga kapa e rua i te papa. I tukuna a Mance ki a Tony McQuay i rere i te 43.4 wehenga whakamiharo hei arahi. Ko te whakakapi a Mitchell, ko Angelo Taylor i werohia i roto i te 50 mita whakamutunga e Ramon Miller kia riro ai i a Bahamas te wikitoria.