Rubuta ci gaba don wannan sakin layi - Liess ya cancanci shiga cikin maza 200 m butterfly a Wasannin Olympics na 2012 a London, ta hanyar karya rikodin Switzerland da kuma haskaka FINA B-cut off lokaci na 1: 58.13 a gasar zakarun Turai
a birnin Debrecen, na ƙasar Hungary. Ya kalubalanci wasu 'yan wasa bakwai a zagaye na biyu, ciki har da tsohon dan wasan tsakiya Hsu Chi-chieh na Taipei na kasar Sin. Liess ya kasance a matsayi na karshe ta hanyar 0.16 na biyu a baya na Kanada David Sharpe. Liess ya kasa ci gaba zuwa wasan kusa da na karshe, yayin da ya sanya na talatin da uku a gaba ɗaya a cikin wasan farko.