In January 2012 King suffered a lacerated ear injury in a collision with Xavier Rush of the Cardiff Blues and had to undergo emergency plastic surgery at Morriston Hospital, Swansea.[1]
In January 2013 he was selected in the 35-man Wales squad for the 2013 Six Nations championship.[2] He made his international debut against Japan on 8 June 2013[3] and would go on to win 11 caps for the national side, including at the 2015 Rugby World Cup.
He was forced to retire from professional rugby in January 2021 aged just 30, after failing to recover from an injury sustained whilst playing against Ulster in 2019.[4]