Mezue ahịrịokwu na-esonụ: Horák malitere ọrụ ya na obodo ya HC České Budějovice nke Czech Extraliga, na-apụta na otu egwuregwu na klọb na 2007-08 na asatọ ọzọ na 2008-09. Ndị New York Rangers họpụtara ya na agba nke ise, nke 127 n'ozuzu, na
2009 NHL Entry Draft. Na mgbakwunye, ndị Chilliwack Bruins nke Western Hockey League (WHL) họpụtara Horák na nke asatọ n'ozuzu na Canadian Hockey League (CHL) mbubata. Ọ bụ ezie na ọ maghị asụsụ Bekee nke ọma, Horák kwagara Canada iji sonyere Bruins maka oge 2009/10 WHL.