 On July 31, , Masset, along with infielder Danny Richar, was traded to the Cincinnati Reds for Ken Griffey Jr. After the trade Masset appeared in 10 games for the Reds going 1–0 with an ERA of 2.08 in innings.The 2009 season saw Masset going 5–1 in 76 innings with an earned run average of 2.37.In 2010 Masset went 4–4 in with an ERA of 3.40.