History of Celtic F.C. (1887–1994) As the season progressed, Frank McAvennie arrived from West Ham and young forward Joe Miller – a very promising prospect – was signed from Aberdeen. This new-look Celtic side, captained by Roy Aitken, quickly gelled and embarked on a 31-game unbeaten run, culminating in a historic League Championship and Scottish Cup double win in the club's centenary season. Walker and McAvennie forged a successful partnership up front whilst Paul McStay enjoyed his finest season, winning both the SPFA and Scottish Football Writers player of the year awards. Celtic clinched the league title on 23 April 1988 with a 3–0 win
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,