Rocky Trimarchi is an Australian semi-professional rugby league footballer for the Western Suburbs Magpies in the New South Wales Rugby League. He has previously played in the NRL for the Wests Tigers and in Europe's Super League for Crusaders. His position of choice is at lock and he can also play in the second-row.
Trimarchi made his NRL début on 16 April 2006, scoring a try in his ninth minute on the field against the Cronulla-Sutherland Sharks. He played for 4 seasons with the Tigers, before being released at the end of the 2009 season.
Shortly before the start of the 2010 season, Trimarchi signed with Crusaders of Europe's Super League. He played one season with the club, appearing in 26 games before returning to Australia.
He is of Italian descent. In 2011 he was announced as a member of the Italian side that will compete in the 2013 World Cup qualifying.