Career
King previously played for Heart of Midlothian and has also represented Scotland at Under 18, 19, and 21 levels. Heart of Midlothian
Having yet to feature for the first team in September 2013, with the transfer window coming to a close, Premier League outfit Swansea City made an offer believed to be a five-figure sum of money for King. However, Hearts administrators BDO International rejected the offer.
Having been included in the match day squad for every game so far that season, yet not featured, he made his first team debut for Heart of Midlothian (Hearts) as a substitute in a friendly against German Bundesliga side Wolfsburg on 13 November 2013.
He made his full professional debut in a Scottish Cup tie against Celtic on 1 December 2013, coming on as a substitute in the 79th minute replacing Jamie Hamill. He went on to make his first Scottish Premiership appearance on 21 December, playing from the start against Celtic at Celtic Park.
In January, Swansea renewed their interest in King and a further bid was accepted by the club In all he made three appearances for Hearts.
He has featured at both under 18 and under 19 levels for Scotland.
King was nominated by STV Sport as one of 14 young players in Scottish football to watch in 2014. Swansea
On 28 January 2014, King joined the Welsh Premier League side, on a three and a half-year deal, for an undisclosed fee. He initially joined up with the club"s under-21 squad.
In July 2015, King joined League One team Crewe Alexandra on loan until 6 January 2016.
King returned to Swansea on 5 January 2016.