Kris Renton joined the Norwich City Academy as a scholar in July 2006. He was spotted, along with Paul McLean, by Academy youth scout Karl Brady playing for Musselburgh Windsor and along with two other lads from Scotland, was invited to Carrow Road for a trial in December 2005. Impressing during that trial, he was offered a scholarship with the Canaries.

Whilst with Musselbrough, Kris won the League Championship, East Region Cup, the Steve Maskrey Cup, the Jackie Faichney Memorial Cup and coming within a whisker of retaining the Scottish Cup.

Kris plays as a striker but was originally a centre-back. He is described as having good touch, control, balance an d pace as well as being 6ft2. He had been scouted by Manchester United, Newcastle, Middlesboro, Leeds, Leicester, Rangers, Hibs (the club Kris supports) and Aberdeen before joining City.

Kris scored twice on his City debut in a pre-season friendly against Waltham Forest which Norwich won 5-0

In September 2006, Kris declared himself eligible for the Republic of Ireland based upon his family ancestry, and joined the Republic's Under 17 side, featuring teammates Kurtis Byrne and Gareth Matthews, for a European Championship qualifying tournament against Azerbaijan, Latviaand Denmark to be held in Baku. However in February 2007, he played for the Scottish Under-17s against Northern Ireland in two friendlies

Renton was called up to the first team at the end of March 2007, and was an unused substitute for the 3-0 defeat at Colchester on 31st March 2007. He instead made his debut as a last minute substitute in the 2-1 win over Nigel Worthington's Leicester on 14th April 2007 becoming City's youngest ever player.

On 6th October 2007, Kris broke his leg whilst playing for the Under-18s against Chelsea which kept him out of action for a number of months.

Kris signed his first professional contract with Norwich in July 2008.

On 6th March 2009, he joined Kings Lynn on loan in order to gain more first team experience.

On 1st September 2009, he was loaned to Scottish side Brechin, managed by Jim Duffy.

In January 2010, Kris was released from his Norwich City contract by mutual consent. He signed for Scottish non-leaguers Musselburgh Athletic, based in his hometown and with whom his brother Kieron plays in goal. He switched to Bonnyrigg Rose Athletic in the summer of 2012. e moved on to local rivals Newtongrange Star in July 2014

In June 2016, he returned to the Scottish league system joining Cowdenbeath. He swtiched to Alloa Athletic in the summer of 2017 and then moved back to Cowdenbeath on 1st July 2018.

He made 79 appearances for Cowdenbeath, scoring eleven goals, before his contract was cancelled on 24th February 2022. The following day he signed for Tranent Juniors of the East of Scotland League Premier Division.