 In his six-and-a-half years with the Pars, Mason appeared in a Scottish Cup final, a Scottish League Cup final and also played in both of Dunfermline's UEFA Cup matches against Icelandic side Hafnarfjarðar.After the Pars relegation to the Scottish First Division in 2007, Mason opted to stay in the SPL with St Mirren, signing on a free transfer.He left the Buddies in June 2009.