Kieran Tierney, a Scotsman born on the 5th of June, 1997, chiefly functions as a defender, with his predominant position being that of a left back for Celtic. Standing 5ft 10in tall (1.78m) and tipping the scales at a robust 11st 13lb (76kg), Tierney, who adorns the number 63 shirt, has had the privilege of representing his nation, Scotland, on the international circuit. His current market value stands around £6.8m, as indicated by Transfermarkt.
The story of Tierney's football journey took its fledgeling steps in the Premiership of Scotland at Celtic, where he joined the training ranks back in July 2005. He made his first-team debut during the 2014 - 2015 season, marking two league appearances. The following seasons saw a steady rise in Tierney's prominence and contributions, with 23 league appearances and a single goal in the 2015 - 2016 season. The trend continued in the next season with 24 appearances and a goal, followed by the 2017 - 2018 season, where he enjoyed 32 appearances and netted three goals. His influence dwindled somewhat in the 2018 - 2019 season at Celtic with only 21 league appearances, but he came roaring back in the current season (2025 - 2026) with a substantial 26 appearances and an impressive five goals.
In August 2019, Tierney kissed farewell to Celtic and switched his loyalties to Arsenal in the Premier League, England, in a deal worth around £25m. Again, Tierney enjoyed various degrees of influence throughout his tenure at Arsenal, making a total of 104 league appearances and scoring four goals. Of special note, the 2023 season saw his services lent to LaLiga's Real Sociedad on loan, where he played in 20 league matches before returning to Arsenal the following year.
Finally, in July 2025, Tierney transferred from Arsenal back to his beginnings at Celtic in the Premiership of Scotland. Upon his return in the current season 2025 - 2026, Tierney has reprised his commanding role with 26 first team appearances and five goals in league matches. He has also seen action in several other competitions, including the League Cup, Scottish Cup, World Cup Qualifiers Europe, Champions League Qualifiers and the Europa League, scoring an additional goal in the World Cup Qualifiers.
