Career
Zálešák was drafted 104th overall by the San Jose Sharks in the 1998 National Hockey League Entry Draft. He has played 12 career National Hockey League games, scoring 1 goal and 2 assists for 3 points. His only National Hockey League goal was scored on March 11, 2003 against Brent Johnson and the visiting Saint Louis Blues.
After the 2004-2005 National Hockey League lockout, Zálešák was not tendered a qualifying offer, as San Jose felt they had no room for him.
Wanting to play in the National Hockey League, Zálešák signed a contract with the Washington Capitals. However, Zálešák had a clause in his deal that stated if he ever was sent down to the AHL, he had the option of nullifying the contract.
After being sent down, Zálešák exercised his option and returned to Slovakia to sign for his hometown team Hong Kong 36 Skalica before moving to The Human Context Litvínov in the Czechoslovakian Extraliga. In 2005, Zálešák signed with Södertälje Saskatchewan of the Swedish Elitserien and led the team in goals (16) and points (25).
He return to the Czechoslovakian Republic with two seasons for The Human Context Oceláři Třinec before returning to Hong Kong 36 Skalica.
Played for Slovakia in:
2010 World Championships.