- The history of rugby through its competitions
Skip Navigation Links
National TeamsExpand National Teams
Tier 1 nations clubsExpand Tier 1 nations clubs
Other nations clubsExpand Other nations clubs
SevensExpand Sevens
Annual Reports
Head to Head
Last updates
The Project

Overview Honours Roll Sources Current Season


It is an annual competition involving fourteen professional sides from Ireland, Italy, Scotland, South Africa and Wales.


Wales and Scotland had joined forces since the 1999/00 seasons, with the expansion of the Welsh Premier Division to include Edinburgh and Glasgow to form the Welsh-Scottish League.

In 2001, an agreement was made between the Irish Rugby Football Union (IRFU), Scottish Rugby Union (SRU) and Welsh Rugby Union (WRU) to create a new competition: the Celtic League.

Ireland decided that it would be represented by the 4 regional professional franchises.

Scotland decided that it would be represented by the 2 regional professional franchises. In 2002/03 season Border Reivers were added but they were dropped in 2007.

Wales was represented in the first two seasons by Welsh Premier Division teams. In 2003, after regionalization, it was decided that the 5 regional professional franchises would have played Celtic League. After only one season, however, the Celtic Warriors were dropped, leaving Wales with 4 teams.

In 2009 it was decided that 2 italian teams would have joined the league in two years. Since 2010/11 Aironi and Benetton Treviso played for the first time. Aironi were dropped after two years for financial problems and were substituted by Zebre.

In 2011/12, to reflect the partecipation of non celtic sides, the name was changed in Pro12.

In 2017/18, a new agreement was made to include the 2 South African franchises excluded from Super Rugby (Cheetahs and Southern Kings).

European Cups

After the 2014 reform of european cups Pro12 qualified 7 teams to Champions Cup and 1 team to Champions Cup playoff. The remaining teams were qualified for Challenge Cup.

The 7 teams were selected as follow:
  • The best irish team
  • The best italian team
  • The best scottish team
  • The best welsh team
  • The three best team not yet qualified

After the birth of Pro14 in 2017, the qualified teams are the 7 best european teams in the tournament, regardless of the country.


www.pro12rugby.com (former www.rabodirectpro12.com and former www.magnersleague.com) - Pro12 official site.
en.wikipedia.org/wiki/Pro12 Wikipedia pages about Pro12.