Karl was born in Liverpool on 13 September 1980. He played for Caernarfon Town, Bamber Bridge, Marine, Oswestry Town, Rhyl, Kidsgrove Athletic, Prescot Cables, St Helens Town, Alsager Town and Warrington Town, initially as a striker – he was described as a "big, powerful centre forward" – and later as a midfielder.
He coached at the Liverpool FC youth academy and later worked as a coach at Blackburn Rovers. Robinson then joined Paul Ince at MK Dons as his assistant manager. He was appointed manager on 10 May 2010 at the age of 29, becoming the youngest manager in the Football League at the time and also the youngest person ever to acquire a EUFA Pro Licence.
In the 2010–11 season, his first season in charge, Karl guided the Dons to fifth place in League One. This was widely
as a achievement, improving on the Dons' points total over the previous season. The team lost in the play-
regarded as a great achievement, improving on the Dons' points total over the previous season. The team lost in the play-
In the 2011–12 season, he continued making impressive strides, attracting big name players and guiding his side to another fifth place finish and was again in the play-
greatest victory, a 4–0 win over Manchester United on 26 August 2014, as well as leading promotion to the Championship for the first time, finishing runners-
relegated. The club’s form back in League One in the 2016-
He was named the new Charlton Athletic manager on 24 November 2016 following the sacking of Russell Slade and his first game in charge was at home against MK Dons in the FA Cup on 3 December.
Karl is married to former Brookside star Ann Marie Davies and they have a daughter, Jasmine. He has also revealed he enjoys deep sea fishing and the works of James Joyce.