Florida / Miami Marlins , the Triple-A affiliate of the
Miami Marlins, in Mattison was drafted by the
Florida Marlins in the 28th round (838th overall) of the
2008 Major League Baseball draft. The Marlins assigned Mattison to the
Arizona Fall League after the 2011 regular season, where he won the
Dernell Stenson Sportsmanship Award. Mattison was added to the Marlins'
40-man roster on November 18, 2011, in order for him to be protected from the
Rule 5 draft. On May 11, 2012, Mattison was recalled to Miami after hitting .250 with three home runs and 13 RBI in 31 games for the Triple-A
New Orleans Zephyrs. Mattison played in one game and recorded one at-bat, a pinch-hit groundout. On May 15, Mattison was optioned back to New Orleans. On May 24, Mattison was recalled to Miami after
Austin Kearns was placed on the 15-day disabled list. He finished the season with the New Orleans Zephyrs. Mattison batted .241, with 23 doubles, six triples, 13 homers, 41 RBI, 44 walks, and 145 strikeouts in 482 at-bats He also stole 26 bases while being caught 12 times. Mattison played in 121 games with a .310 OBP, a .394 SLG, and a .704 OPS.
Milwaukee Brewers On December 12, 2013, Mattison was selected by the
Milwaukee Brewers in the minor league phase of the
Rule 5 Draft. He made 91 appearances for the Triple-A
Nashville Sounds, batting .212/.294/.387 with seven home runs, 29 RBI, and 13 stolen bases. Mattison was released by the Brewers organization on August 21, 2014.
Washington Nationals On December 22, 2014, Mattison signed a minor league contract with the
Washington Nationals. He made three appearances for the Triple-A
Syracuse Chiefs, going 1-for-6 (.167) with one stolen base. Mattison was released by the Nationals organization on May 8, 2015. ==See also==