IRFU Interprovincial Championship
The IRFU Interprovincial Championship was a rugby union competition between the four provinces of Ireland – Ulster, Leinster, Munster and Connacht – run by the Irish Rugby Football Union. It was run as a distinct competition from 1946–47 to 2000–01, with the 2001–02 fixtures being fulfilled by the match-ups in the newly formed Celtic League. For a time in the 1980s, the IRFU ruled that Irish diaspora players should play for Connacht, in an attempt to strengthen the weakest of the four provinces. The Irish Exiles took part for four years (1992–93 – 1995–96).
In 2023 the United Rugby Championship announced that the regional pool shields of that competition, introduced in 2021 to crown regional champions, would be decided only be results between the teams within each pool. With this change, URC effectively reintroduced the Interprovincial Championship in its original format for the first time since 2002.