Tuhia he haere tonu mō tēnei wāhanga - I te 2012 Summer Olympics i Rānana, Joyce whakairihia he wa 25.28 hēkona i roto i te Heat 8 o te 50 mita freestyle
, i akiaki ia ki te kaukau ki etahi atu kaiwhakataetae e rua mo te tekau ma ono me te waahi whakamutunga i te haurua whakamutunga o te 50 mita. I akiakihia e te mano o te kaainga, ko te kaiwhakataetae o Ingarangi a Amy Smith i wikitoria i te kaukau me te waa 24.82, ka mutu te uru atu o Joyce ki te kaupapa.