The former England under-21 international originally penned a three-and-a-half year a deal at the Macron Stadium in the 2011 January transfer window, arriving from Middlesbrough for an undisclosed fee.
Wheater had been with the Teesside club since the age of 17 and scooped the FA Youth Cup in the 2003/04 season. He later went on to captain the first team and represent Middlesbrough in Europe, before call-ups to the full England set-up followed.
Having also enjoyed previous loan spells with Doncaster Rovers, Wolverhampton Wanderers and Darlington, Wheater left the Riverside Stadium having amassed over 150 appearances.
Wheater made 11 appearances for Bolton towards the end of the 2010/11 campaign after completing his move from Middlesbrough, with Wanderers not conceding a goal during his first 345 minutes of action for the club.
In 2011/12 Wheater made 30 appearances for the Whites and popped up with a brace of headers in Bolton’s 2-1 victory over Blackburn Rovers before injury saw him miss the majority of the following campaign.
Scoring the winner against Blackpool as he recovered to make 23 appearances the following season, the defender went on to make 21 and 29 appearances in the 2014/15 and 2015/16 campaigns respectively.
Initially leaving the club at the end of his contract that summer, Phil Parkinson brought Wheater back to the club during pre-season with him signing a new contract with the club after impressing on trial.