 On November 12, 2013, Mason recorded his first shutout for Philadelphia against the Ottawa Senators in a 5–0 win.On January 18, 2014, Mason signed a three-year contract extension with the Flyers worth $12.3 million for an annual average of $4.1 million.Mason finished the 2013-14 season with a 33-18-7 record and a .917 save percentage, which was enough to bring the Flyers to the playoffs.