Masset was drafted in the eighth round (244th overall) of the 2000 Major League Baseball draft by the Texas Rangers.[1] He had UCL replacement surgery in March of his senior year prior to the draft. Masset was a draft and follow and played for the St. Petersburg Jr College Trojans for one season before signing with the Rangers on May 28, 2001.[2] Masset had minor league stints with the Single-A Stockton Ports, Double-A Frisco RoughRiders and Triple-A Oklahoma RedHawks prior to his first call-up in June 2006.[3][4]
On July 31, 2008, Masset, along with infielderDanny Richar, was traded to the Cincinnati Reds for Ken Griffey Jr.[7] After the trade, Masset appeared in 10 games for the Reds, going 1–0 with an ERA of 2.08 in 17+1⁄3 innings.[2] The 2009 season saw Masset going 5–1 in 76 innings with an earned run average of 2.37 in 74 games.[2] In 2010, Masset went 4–4 in 76+2⁄3 innings with an ERA of 3.40 in a career-high 82 appearances.[2] In 2011, Masset made 75 appearances and went 3–6 in 70+1⁄3 innings to an ERA of 3.71.[2] At the start of the 2012 season, Masset was sidelined with a right shoulder injury and was placed on the disabled list.[8] He would not pitch all year before having surgery on September 7 to repair a torn anterior capsule.[9] Masset was expected to be ready for the start of the 2013 season but would again miss the entire season. Masset had surgery to correct thoracic outlet syndrome.[10]
Masset agreed to a minor league contract with the Colorado Rockies for the 2014 season.[11] He was called up on May 5, relieving for the first time in two years.[12] On June 17, Masset was suspended for three games following an incident against Atlanta in which he was ejected for throwing at Evan Gattis. Masset elected not to appeal the suspension and began serving it on June 17.[13] He finished the season 2–0 with a 5.80 ERA in 51 appearances.[2]
Masset signed a minor league contract with the Miami Marlins on January 13, 2015.[14] He was released on March 31 and re-signed the next day.[15] He was recalled on April 21.[16] Masset was designated for assignment on May 17 to make room for starting pitcher Henderson Alvarez, who was coming off the disabled list.[17]
On May 19, 2015, Masset signed a contract with the Atlanta Braves.[18] He was designated for assignment along with Dana Eveland on July 5 to create room for David Carpenter whose contract was purchased and Arodys Vizcaino who was activated from the restricted list.[19]
