Celtic F.C. their sixth successive league title on 2 April 2017, with a record eight league games to spare. As Celtic's unbeaten domestic run continued, they subjected Rangers to their heaviest defeat at Ibrox since 1915, 5–1, on 29 April. Celtic's 2–0 win over Hearts on 21 May saw them finish 30 points ahead of second-placed Aberdeen in the league, with a record 106 points, and the team became the first Scottish side to complete a top-flight season undefeated since Rangers in 1899. On 27 May 2017, Celtic clinched their fourth treble by defeating Aberdeen 2–1 in the Scottish Cup final. The
2010–11 Celtic League place 28 May and was hosted by the team that finished highest in the table following the regular season. The title was won by Munster who defeated Leinster by 19–9 at Thomond Park. This was the final season of the Celtic League sponsored by Magners. The following season would see RaboDirect, the Irish subsidiary of Dutch financial company Rabobank, take over the sponsorship. At the same time, the league rebranded itself as Pro12. The twelve teams competing were the four Irish provinces, Munster, Leinster, Connacht and Ulster; two Scottish regions, Edinburgh Rugby and Glasgow Warriors; four Welsh regions, Cardiff Blues,