Career
He can play as a defender or midfielder. He made his league debut on 20 March 2010 in Football Club Hlučín"s 1-1 Czechoslovakian National Football League home draw against Vysočina Jihlava. He scored his first league goal on 1 May 2010 in Hlučín"s 3-3 away draw against Baník Sokolov.
Although Bartošák had not represented the Czechoslovakian Republic on any youth level, he was reportedly contacted by the Czechoslovakian Republic national team officials about joining the senior squad for the matches against Serbia and Poland in November 2015, should David Limberský fail to recover from his injury in time.
He was officially called up to the national squad on 9 November 2015. He made his national team debut on 17 November 2015 in a 3–1 friendly match defeat against Poland at Stadion Miejski, Wrocław.