Career
Hruška started his career at Slavoj Vyšehrad which he left in 1974 in order to undergo a 2 years of military service. After nine years with Bohemians he left in 1985 for Slavia Prague where he spent two years. In the season of 1987/1988 he played for Veria Football Club in the Greek Super League.
After that he returned to Bohemians but after a single season in Prague he left again and went to Wacker/Groß Viktoria in the Austrian Regional league.
In 1990 Hruška transferred to FAC Viktoria Wien where he retired from playing. In the top league of Czechoslovakia Hruška played a total of 247 games.
National team
Hruška had his debut in the Czechoslovakia national team on 9 December 1977 in a friendly against Hungary. He missed the 1980 European Cup due to an injury.
He didn"t do very well in the first game for Czechoslovakia at the 1982 Fédération internationale de football association World cup where Czechoslovakia made a disappointing draw with Kuwait.
Stanislav Seman replaced him in goal in the following match against England. Hruška played his last game (from a total of 24) as Czechoslovakia played a 1:1 draw against Romania on 30 November 1983. From 1992 Hruška was an assistant manager at Bohemians Prague, in 1995 he was appointed as general manager.
His next stations included Football Club Turnov in the fourth league and Vermont Chomutov in the third league.
In the 1997/98 season he was a co-manager for Slovan Liberec, from 1999 until 2001 he worked as a goalkeeper trainer for Tennis Borussia Berlin in Germany. Later he took up the Prague team FSC Libuš, returned to Bohemians Prague and after being fired just a few months later, returned to managing FSC Libuš again.