The midfielder joins the club from a recent stint at top-flight Norwegian side Aalesunds FK.
The former Crystal Palace, Birmingham City, Cardiff City, and Watford midfielder brings a wealth of experience and a winning mentality to the Wanderers having won the Championship and League Cup, as well as a runner up for the FA Cup and Canadian Championship.
Mutch has amassed over 200 professional appearances and has played close to 80 matches in the Premier League.
The 29-year-old will link up for a second time with head coach Carl Robinson who he played under at Vancouver Whitecaps.
