Fitzgibbon began his playing career for the Illawarra Steelers in 1998. In his first season, he was the Steelers' top point-scorer and was named rookie of the year. Following the Steelers' merger with St. George Dragons, he played for the merged club St. George Illawarra Dragons. Fitzgibbon played from the bench in the 1999 NRL Grand Final, scoring the first try in the Dragons' 20–18 loss. Fitzgibbon subsequently transferred to the Roosters in 2000. He played at second-row forward and scored a try in the Roosters' 2000 NRL Grand Final loss to the Brisbane Broncos. Eventually, Fitzgibbon won a premiership with the Roosters, playing at second-row forward in their 2002 NRL grand final victory over the New Zealand Warriors and winning the Clive Churchill Medal for his best-on-ground performance. Having won the 2002 NRL Premiership, the Roosters travelled to England to play the 2003 World Club Challenge against Super League champions, St Helens R.F.C.. Fitzgibbon played at second-row forward, scoring a try and kicking nine goals in Sydney's victory. In the 2003 NRL grand final Fitzgibbon played in the second row and was the Roosters' goal-kicker in their loss to the Penrith Panthers. After that he was selected to go on the 2003 Kangaroo tour. Fitzgibbon played for the Roosters at second-row forward in their 2004 NRL grand final loss to cross-Sydney rivals, the Bulldogs. Fitzgibbon was selected in the Australian team to go and compete in the end of season 2004 Rugby League Tri-Nations tournament. In the final against Great Britain he played from the interchange bench and kicked two goals in the Kangaroos' 44–4 victory. In 2006, Fitzgibbon succeeded Luke Ricketson as captain of the Roosters. On 12 August 2006, he became the highest scoring forward in premiership history, surpassing ex-Canberra Raiders back-rower David Furner. Fitzgibbon passed the previous record of 1218 points by converting winger Sam Perrett's third try in the 64th minute after beginning the match four points behind the Canberra forward. In August 2008, Fitzgibbon was named in the preliminary 46-man Kangaroos squad for the 2008 Rugby League World Cup, and in October 2008 he was selected in the final 24-man Australia squad. On 16 May 2009 it was announced that Craig had signed a one-year deal, with the option of a second year, with Super League side Hull F.C. for the 2010 season.
Super League
Craig Fitzgibbon was selected for the Exiles squad for the Rugby League International Origin Match against England at Headingley on 10 June 2011. On 3 September 2011 Fitzgibbon suffered a fracture and ligament damage to his ankle and announced his retirement at the age of 34. On the 26 September announced he would return to the Sydney Roosters in 2012 as a part of its Coaching Staff
Highlights
Played in the 1999, 2000, 2002, 2003 & 2004 Grand Finals
Won the Clive Churchill Medal in the 2002 Grand Final