Burnley completed the signing of the experienced midfielder for a second time at the start of the 2017 January transfer window.
Barton, 34, had previously been training with the Clarets after ending a short stay with Rangers.
The deal – initially until the end of the 2016/17 season – meant a return to Turf Moor for the former England international after he helped Sean Dyche’s side win promotion to the Premier League in 2016.
However, in April, 2017, Barton was suspended from football and all football activity for 18-months with immediate effect after admitting an FA misconduct charge in relation to betting. Barton immediately appealed against the length of this sentence.
Burnley initially signed Barton as a free agent in August, 2015, on a one-year deal after the ex-QPR midfielder turned down the chance to stay in the top flight, or take up options abroad, to join the Clarets in the Championship.
Born in Huyton, Barton came through Manchester City’s academy and made his first-team debut for City against Bolton Wanderers in April 2003.
During his time at the Etihad Stadium, Barton’s performances earned him an England U21 call-up for their 2004 European Championships, and after continuing to impress at the heart of midfield, he was awarded the club’s Young Player of the Year award at the end of the 2003/04 season.
In 2007, Barton was called up to the senior England side after impressive club form and came on as a substitute in the 78th minute, replacing Frank Lampard in a 0-1 defeat to Spain at Old Trafford.
He made over 150 appearances at City, before Newcastle paid £5.8m for his services in 2007.
The former England international spent four years on Tyneside, helping the side to bounce straight back to the Premier League as Championship winners in the 2009/10 season.
After 84 appearances at St James' Park, he joined Queens Park Rangers on a free transfer in 2011. His combative, all-action style endeared him to the Loftus Road faithful and he became an integral part of their side.
But having being unable to help prevent relegation from the Premier League in the 2011/12 season, Barton spent a year on loan at Marseille in Ligue 1.
He then returned to QPR and helped the club return to the top-flight via the Play-Offs after a 1-0 win over Derby County at Wembley in 2014.
At the end of his contract at Loftus Road 12 months later, he weighed up his options before linking up with the Clarets a few weeks into the Championship season.
In a successful first stint at Turf Moor, Barton played a key role in helping Burnley secure promotion, starting 37 successive Championship games as Dyche's side topped the table.
Barton's efforts earned him the award as Burnley’s Player of the Year before he accepted the offer of a two-year contract at Rangers to begin a new challenge in the Scottish Premiership.
However, that move failed to work out and after just a handful of games for the Glasgow club his contract at Ibrox Park was terminated, allowing Barton to return to England and Burnley once the mid-season transfer widow had opened.