At inter-county level, O'Shea won Munster Championships at all levels, Minor in 1990, Under 21 in 1991 & 1992 and Senior in 1996 as captain and 1997. He also played in All Ireland final at all levels, losing Minor in 1990 and Under 21 in 1991. O'Shea won a Senior All Ireland medal in 1997 but was taken off early in the game after breaking his leg after a mix up with teammate Maurice Fitzgerald.[2]