M. O’Mahony is a 21-year-old professional football player from IRL. At the international level, he represents Ireland U21. He plays primarily as a Forward. His preferred foot is Right. His current market value is estimated at 375K .

His most recent move was a Loan from Reading to Brighton U23 on 2026-05-31.

In the FA Cup 2025-2026 season, M. O’Mahony scored 1 goals and provided 0 assists across 1 appearances, averaging 1 goals per game with 1 shots attempted and 1 on target.