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
2006–07 Celtic League 2006–07 Celtic League The 2006–07 Celtic League (known as the 2006–07 Magners League for sponsorship reasons) was the sixth Celtic League season and the first with Magners as title sponsor. The season commenced on 1 September and was completed on 12 May. The teams competing remained the same as the previous season with four Irish provinces; Munster, Leinster, Connacht and 2005–06 champions Ulster, three Scottish regions; Edinburgh, Border Reivers and Glasgow Warriors and four Welsh regions; Llanelli Scarlets, Cardiff Blues, Ospreys and Newport Gwent Dragons. The league was won for the second time in three seasons by the Ospreys, with