Rubuta ci gaba don wannan sakin layi - A Wasannin Olympics na 2012 a London, Joyce ya rubuta lokaci 25.28 seconds a Heat 8 na mita 50 na kyauta
, wanda ya tilasta mata yin iyo tare da wasu masu fafatawa biyu don na goma sha shida da na karshe a wasan kusa da na karshe na mita 50. Ta hanyar ƙarfafawa daga masu sauraron gida, dan takarar Birtaniya Amy Smith ya lashe gasar tare da lokacin 24.82, ya kawo karshen halartar Joyce a cikin taron.