Swansea City completed the signing of Southampton midfielder Cork at the end of the 2014 January transfer window.
The former England Under-21 international arrived for an undisclosed fee and agreed a deal which runs until the summer of 2019.
Cork, the son of former Swans boss Alan, has since proved a fine acquisition.
He made 151 appearances in all competitions for Southampton, and helped the Saints win promotion to the Premier League in 2012.
His performances with Southampton also earned him a place in Great Britain’s squad for the 2012 Olympics.
He began his career with Chelsea at the age of nine, and went on to captain their youth and reserve teams.
Cork gained valuable experience over the next few years during loan spells at Bournemouth – for whom he made his senior debut against the Swans – Scunthorpe, Southampton, Watford, Coventry and Burnley.
He made an immediate impact in his first few months as a Swan, impressing with his composure and energy in midfield.
Cork has been a regular presence in the Swans’ starting side ever since arriving in SA1, and captained the team for much of 2016-17 in the absence of club skipper Leon Britton.