Rugby - Celtic League/PRO12/PRO14
In response to the huge success of the English Premiership and French Top 14, Ireland, Scotland and Wales organised themselves into a season-long league competition. In 2009/10 the tournament joined the other leagues in adopting a final to decide its champions.From 2010/11, two Italian clubs joined and the competition was renamed the PRO12 from the following season. In 2017/18 the league was expanded to include two South Africa-based sides, was turned into a two conference format, plus the knockout stage, and called the PRO14.
| YEAR | WINNERS | RUNNERS-UP |
| 2002 | LEINSTER (Ire) | Munster (Ire) |
| 2003 | MUNSTER (Ire) | Neath (Wal) |
| 2004 | *SCARLETS (Wal) | Ulster (Ire) |
| 2005 | *OSPREYS (Wal) | Munster (Ire) |
| 2006 | *ULSTER (Ire) | Scarlets (Wal) |
| 2007 | *OSPREYS (Wal) | Cardiff Bl (Wal) |
| 2008 | *LEINSTER (Ire) | Cardiff Bl (Wal) |
| 2009 | *MUNSTER (Ire) | Edinburgh (Sco) |
| 2010 | OSPREYS (Wal) | Leinster (Ire) |
| 2011 | MUNSTER (Ire) | Leinster (Ire) |
| 2012 | OSPREYS (Wal) | Leinster (Ire) |
| 2013 | LEINSTER (Ire) | Ulster (Ire) |
| 2014 | LEINSTER (Ire) | Glasgow (Sco) |
| 2015 | GLASGOW (Sco) | Munster (Ire) |
| 2016 | CONNACHT (Ire) | Leinster (Ire) |
| 2017 | SCARLETS (Wal) | Munster (Ire) |
| 2018 | LEINSTER (Ire) | Scarlets (Wal) |
| 2019 | LEINSTER (Ire) | Glasgow (Sco) |
| 2020 | LEINSTER (Ire) | Ulster (Ire) |
| Finals at: | |
| LR/Aviva | 2002, 2017, 2018, 2020 |
| Cardiff (M/P) | 2003 |
| RDS | 2010, 2012, 2013, 2014 |
| Thomond Pk | 2011 |
| Kingspan | 2015 |
| Murrayfield | 2016 |
| Celtic Park | 2019 |
*2004-2009 - No Final
| Links to other Rugby Union |
| National Teams | Club/Provincial |