A tough tackling back row and lock forward, Harley was a fan favourite. Often underestimated to the cost of opposition teams and players. Harley provided teams with continuity of attacking ball and intelligence in defence, cutting off attacking options and space forcing opposition to run into numbers in defence. Speed of thought in lineout play also assisted other players to shine with lineout steals due to his movement and lifting. He was the first player to have played 200 times and 250 times for Glasgow Warriors as his unselfish play helps the team play better. Frequently overlooked at national level, he doesn't do the flash work often delivering what needs done for the whole game due to huge fitness and drive.
Harley scored the first try of the 2014/15 Pro12 final which Glasgow Warriors went on to win. He gained his 200th cap for the Warriors on Sunday 13 January 2019 against Cardiff Blues in the European Champions Cup which they won 33 -24. He played his 250th game v Edinburgh in May 2021. His final season with the Warriors saw him end his tally on 267 caps, a club record.[4]
US Carcassone
On 14 June 2022 it was announced that Harley had signed for French side Union Sportive Carcassonnaise in a two-year deal.[1]
US Colomiers
On 31 July 2023 it was announced that Harley had signed for Colomiers.[5]
Old Glory DC
On 19 September 2023 Old Glory DC announced that they had signed Harley for MLR 2024.[6]
International career
After some good performances for Glasgow in his debut season he earned a call up to the Scotland senior squad for the 2011 Six Nations Championship. Harley scored a match-winning try on his Scotland debut, against Samoa in June 2012.[7] He was picked throughout the 2015 6 Nations Championship. His most recent cap was against Georgia in 2020.
