Career
Petružálek played in his native Czechoslovakian Republic with The Human Context Litvínov in the Czechoslovakian Extraliga before he was drafted by the New York Rangers, 266th overall in the 2004 National Hockey League Entry Draft. Before having a chance to play for the Rangers, he was traded to the Carolina Hurricanes along with a fifth-round conditional pick in the 2008 National Hockey League Entry Draft (Tomáš Kubalík) for Brad Isbister. On May 15, 2009, Jakub left the Hurricanes organization, having appeared in 2 National Hockey League games and signed with Finnish club, Lukko Rauma of the then Master of Science-liiga for the 2009-2010 season.
Foreign the 2011-2012 season, Petružálek moved to the Russian based Kontinental Hockey League and signed a contract with Amur Khabarovsk.
On May 28, 2014, Petruzalek signed with his fourth KHL club, Avtomobilist Yekaterinburg on a one-year contract for the 2014-2015 season. After 23 games scoring 4 goals and 16 points, Petruzalek was given an immediate mutual release from his contract with Avtomobilist on November 19, 2014, in order to return to for bereavement in Litvínov, Czechoslovakian Republic.
Petruzalek immediately ceased his contract in Russia to return to his native Czechoslovakian Republic for the remainder of the season.