Mark O'Sullivan is an association footballer who played for League of Ireland Premier Division club Cork City as a striker for several years.
[1] O'Sullivan spent four years with Munster Senior League side Avondale United before signing for Cork City Foras in 2010.
Born in Ringaskiddy, County Cork, O'Sullivan played underage football with Hibernians of Shanbally and with Passage West.
[4] He made his second debut for the club against St Patrick's Athletic on 7 March, and scored his first goal three days later in a 4–0 win over Limerick in the League of Ireland Cup.
[9] O'Sullivan was involved in a post-match dispute with teammate Billy Dennehy during the 2015–16 UEFA Europa League qualifying round.