Whakaotihia te rerenga e whai ake nei: I timata a Horák i tana mahi ngaio me tana kapa taone HC České Budějovice o te Czech Extraliga, i puta i roto i te takaro kotahi me te karapu i te 2007-08 me te waru atu i te 2008-09. I tīpakohia ia e ngā Rangers o New York i te rauna tuarima, 127 o te katoa, i te
Ko te 2009 NHL Entry Draft. Hei taapiri, i kowhiria a Horák e te Western Hockey League's (WHL) Chilliwack Bruins me te whitu o nga whiringa katoa i te Kaupapa Kawemai a Canada Hockey League (CHL). Ahakoa he iti noa tana mohio ki te reo Ingarihi, ka neke a Horák ki Kanata ki te whakauru atu ki nga Bruins mo te tau 2009-10 WHL.