Chad O'Sullivan is a current footballer with the North Adelaide Football Club. He previously played for Central District during their "decade of dominance" having a key role.
O'Sullivan played in the 2007, 2008, 2009 grand finals for the Bulldogs. Chad broke two bones in his leg during the 2009 grand final and missed the 2010 grand final. After three operations on his leg he made a comeback for the Bulldogs and played in the 2011 grand final against the Eagles but lost. He was delisted by the Bulldogs in 2012 despite being a reserves premiership player that year.
Looking for a new club, O'Sullivan took refuge at North Adelaide with Roosters coach Josh Francou and former teammate now assistant coach Matthew Slade. O'Sullivan played in the 2013 SANFL Grand Final for the Roosters in the forward line but lost to Norwood.
In 2014, O'Sullivan played a number of matches for the reserves. At the end of the 2014 season O'Sullivan decided to play for Torrens Valley.