McMaster once again returned this time to Peterborough United. McMaster then requested he be transferred from Leeds while still on loan at Peterborough. He played a few games for Leeds early on in Leeds first season in the championship after being relegated from the Premier League. Following transfer negotiations McMaster moved to AGF Aarhus in Denmark for a very brief period of time before returning home and playing for the Central Coast Mariners in the A-League, where he remained until 2007.