The Softball Ireland National Club Championship (SINCC) is the Premier Slowpitch Softball Competition in Ireland, played between the winners of the Regional Leagues. The Brian Walshe Cup (Previously the ISA Cup) is second on the Order of Merit and the Irish Open Softball Trophy (IOST) third. Below this are the Regional (Provincial) Leagues. [Reference: 1]
References:  The Baseline – Irish Softball Community | Facebook Group (2020) Colum Lavery’s [Softball Ireland President]Reply to Post by Enda Mulcahy, 12 January 2020 [Internet] Available from: https://www.facebook.com/groups/2272568132795300/permalink/2870358163016291/ [Accessed 12 January 2020]
The Softball Ireland Brian Walshe Cup is the Premier Cup Competition in Ireland, played since 2008, and preceded by the Softball Ireland / Irish Softball Association Cup (1995-2007), the Irish Baseball & Softball Association / Federation Softball Championship (1990-1994) and the Aughinish All-Ireland Challenge (1986-1988).
Irish Softball Cup
SI Brian Walshe Cup 2008-Present; SI Cup 1995-2007; Irish Softball Championship 1990-1994; Aughinish All-Ireland Challenge 1986-1988
Softball Ireland Cups (All-Time Overview)
Softball Ireland Cups (Decade / Era Overview)