1990 proved to be a memorable year for Walsh and for Cork. A key member of the senior hurling team, he won a third Munster winners' medal following a great victory over Tipperary, the reigning All-Ireland champions. Not long after this Walsh was playing in the Munster football final. For the fourth year in-a-row Cork were the masters of the province as they trounced Kerry by 2–23 to 1–11. The subsequent All-Ireland hurling final that year pitted Cork against Galway for the second time in four years. Galway were once again the bookies favourites and justified this tag by going seven points ahead at the interval. Cork fought back with an expert display by Tomás Mulcahy and went on to win a high-scoring and open game of hurling by 5–15 to 2–12. It was Walsh's second All-Ireland hurling medal. Two weeks after this victory Walsh was back in Croke Park as a member of the Cork football panel that were playing in the All-Ireland final. Old rivals Meath were the opponents on this occasion as the two sides met for the third time in four years. Walsh, however, played no part in the game as the fourteen men of Cork won the game by 0–11 to 0–9. Disappointingly, Walsh was not eligible for an All-Ireland medal, even as a substitute. He left the Cork inter-county football team following this.