Cathal O'Sullivan, born on 5 March 2007 (age 19), is a Republic of Ireland attacking midfielder whose senior career has so far been shaped almost entirely at Cork City.
He has made 21 league appearances for Cork across two seasons, all without a league goal. The 2025 campaign gave him his main run in the side, with 21 league outings, and remains the clearest measure of where he is in senior football: involved, still developing, and not yet a player with a large body of work behind him.
O'Sullivan was linked with Celtic in July 2025 while at Cork City. His market value is around £106,000, according to Transfermarkt.
At this stage, his profile is straightforward: a young Irish midfielder attached firmly to Cork City, with early senior minutes behind him and the bulk of his career still ahead.
