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Marler made his Quins debut in 2009-10 and was part of the squad that won the 2011-12 Premiership title, where he started in the 25-23<\/a> semi-final win over Northampton Saints and the 30-23<\/a> final victory over Leicester Tigers at Twickenham.<\/p>\n He played 18 times in the club’s run to their second league title, starting in the epic 40-38<\/a> final victory over Exeter Chiefs at the national stadium.<\/p>\n The Quins legend has made two appearances so far this season and is in line to play his last professional match against Bristol on Friday.<\/p>\n “The most important thing I want to say to our fantastic supporters is thank you,” he said. <\/p>\n “Thank you for your patience and support, when you could easily have turned your back on me. <\/p>\n “For the kindness you’ve shown, even when I haven’t deserved it, and for cheering my name, even after I’d been banned again.”<\/p>\n News of Marler’s retirement comes amid a flurry of contract extensions announced at Harlequins during the autumn international break.<\/p>\n Vice captain Cadan Murley,<\/a> scrum-half Will Porter,<\/a> winger Cassius Cleaves, <\/a>full-back Tyrone Green,<\/a> flanker Will Evans<\/a> and hooker Sam Riley<\/a> have all committed their futures to the club in the past two weeks.<\/p>\n<\/div>\n