Mario Preskar (born January 12, 1984) is a former Croatian professional heavyweight boxer.

Preskar became a seven-time Croatian national champion, his final amateur record was 45-5.

[1] Preskar started his professional career in 2003, at only 19, signing a contract with the world-famous boxing manager Don King.

[3] In his 19th professional fight against Maksym Pedyura on June 27, 2009 in Lviv, Preskar was ahead throughout most of the match, but was knocked down twice in the last round.

Preskar ascribed the incident to extreme exhaustion, due to high temperature and insufficient ventilation in the hall.