The Irish Open Softball Tournament (known as IOST) is the highlight of the softball calendar in Ireland. This tournament sees a large number of teams congregate in Limerick for two days of softball, fun and social antics. Team registration for the Brian Walshe Cup opens up early each year (owing to its popularity), with details advertised on the Softball Ireland website and social media pages.
Latest IOST News
- IOST Registration is Open!!
IOST 2024 will return to MTU in Cork on the 17th and 18th of August… Read more: IOST Registration is Open!! - Registration for IOST – Open
The previously postponed IOST has been reorganised as a one day event to be held… Read more: Registration for IOST – Open - Save the date – IOST Scheduled for August 21-22, 2021
The Softball Ireland Board have provisionally scheduled the 2021 IOST tournament for August 21-22, 2021… Read more: Save the date – IOST Scheduled for August 21-22, 2021 - Softball Ireland Provisional 2021 Calendar
Softball Ireland are pleased to announce the provisional calendar for the 2021 season. You can… Read more: Softball Ireland Provisional 2021 Calendar - 2020 Tournament Calendar
Softball Ireland have published the provisional 2020 tournament calendar on its website. The calender currently… Read more: 2020 Tournament Calendar
Past IOST Winners
| Year | Venue | Runner Up | Winner |
| 2023 | MTU Cork | Ori-ginals | Belfast Softball Club |
| 2022 | MTU Cork | Traiderz | BatPak |
| 2021 | Not Held Due to Covid | ||
| 2020 | Not Held Due to Covid | ||
| 2019 | University of Limerick | ||
| 2018 | University of Limerick | ||
| 2017 | Carlow IT | ||
| 2016 | University of Limerick | Dodder Dynamoes | Marlay |
| 2015 | University of Limerick | 2Pak | Originals |
| 2014 | University of Limerick | Dodder Dynamoes | Originals |
| 2013 | University of Limerick | Dodder Dynamoes | Originals |
| 2012 | University of Limerick | Originals | Stingers* |
| 2011 | University of Limerick | Originals | Dodder Dynamoes |
| 2010 | Cork IT | Stingers* | Marlay Martyrs |
| 2009 | Cork IT | Stingers* | Oddsox Green |
| 2008 | University of Ulster | Stingers* | BatPak |
| 2007 | University of Limerick | BatPak | Oddsox Green |
| 2006 | University of Limerick | Stingers* | BatPak |
| 2005 | University of Limerick | BatPak | |
| 2004 | London Breakers* | ||
| 2003 | Oddsox Green | ||
| 2002 | ? | ||
| 2001 | Saints Stingers* | ||
| 2000 | Dodder Dynamoes | ||
| 1999 | Oddsox | ||
| 1998 | Warpak | ||
| 1997 | Batpak | ||
| 1996 | Marlay Martyrs |