((Sport TV!!)) Dragons Rugby v Ulster Rugby Live Broadcast 14 April 2023
The dominant team in this era has been Leinster, who have appeared in eleven out of 15 playoff finals, been both a winner and runner up in the 'round-robin' era, and have won 8 league titles in total, including 'four in a row' between 2017 and 2022. The two closest rivals to this dominance have been domestic and European rivals Munster with three titles and six runners-up spots, and Welsh flagship Ospreys with two titles in the round-robin era and two in the play-offs era. Ulster, Connacht, Scarlets (twice, once as Llanelli Scarlets, once as Scarlets), Glasgow Warriors and Stormers have also taken home the title.
The Pro12 (2011–2017) 2011–12 The 2011–12 season saw a re-branding of the competition as the RaboDirect Pro12. Leinster were the runaway winners of the regular season, with a 10-point cushion over the Ospreys in second.  The top four were Leinster, Ospreys, Munster and Warriors in that order. Ospreys easily overcame Munster at home in the first semi-final in Swansea while Leinster beat the Glasgow Warriors in the RDS after giving up a strong lead.  In the final, also held at the RDS, Leinster were aiming to become the first Celtic League team to complete a domestic and European double, after beating Ulster the previous week in the Heineken Cup final. After trailing for most of the game, Ospreys took a late lead through a try by Shane Williams.
The final will be held in a pre-arranged venue. Championship points are awarded using the bonus points system; 4 points for a win and 2 for a draw. Bonus points can be earned so long as teams can either score four or more tries in a game and or lose by seven points or less – should a team do both, two bonus points are gained. As for European qualification, the South African teams are eligible for European competition.
 In September 2016, it emerged that Vancouver and Houston may be target cities, primarily due to weather considerations, though the distance from the other teams may make that more of a challenge.  While the North American plan remains active, media attention turned in 2017 toward a new possibility of South African teams entering the competition. Following the decision of Super Rugby organiser SANZAAR to drop three teams from the competition (two from South Africa), multiple media reports indicated that the two likeliest South African sides to be axed, the Cheetahs and Southern Kings, could be added to Pro12 as early as the 2017–18 season.
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