 On April 8, Mason signed a one-year contract extension worth $1.5 million.Mason had four wins and two losses in Philadelphia and posted an impressive 1.90 GAA and a .944 save percentage, leading to speculation that Mason would replace Ilya Bryzgalov as the starter for Philadelphia.In the off-season, on June 25, 2013, Bryzgalov was bought-out by the Flyers, where the team subsequently signed goaltender Ray Emery, effectively promoting Mason to the starter's role.