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
2009–10 Celtic F.C. season on 27 March. Lennon won all the remaining league games, but was unable to prevent Rangers from winning the league title. Celtic lost their Scottish Cup semi-final against Ross County 2–0. This was Lennon's only defeat during his tenure as interim manager. After the end of the season, Lennon succeeded Tony Mowbray as the next Celtic manager on a permanent basis. Fixtures and results for Celtic FC Season 2009/10. "List of squad players, including number of appearances by competition" 2009–10 Celtic F.C. season The 2009–10 season was the 121st season of competitive football by Celtic. Celtic started their 2009–10 campaign