The Marlins assigned Mattison to the Arizona Fall League after the 2011 regular season , where he won the Dernell Stenson Sportsmanship Award .
Mattison was drafted by the Marlins in the 28th round ( 838th overall ) of the 2008 MLB Draft .
The Marlins assigned Mattison to the Arizona Fall League after the 2011 regular season , where Mattison won the Dernell Stenson Sportsmanship Award .
Mattison was drafted by the Marlins in the 28th round ( 838th overall ) of the 2008 MLB Draft .