The Players Choice Awards are presented by the Major League Baseball Players Association and voted on by players.
Dunn was also named the American League Comeback Player of the Year by The Sporting News on Oct. 23.
Dunn, an All-Star selection, batted .204 with 41 home runs, 96 RBIs, 105 walks and 87 runs in 151 games in 2012. He led the majors in walks and strikeouts and finished tied for fifth in home runs. His 41 homers tied for sixth most in franchise history and were the second most by a left-handed hitter behind Jim Thome's 42 in 1996. Dunn also hit his 400th career home run and recorded his 1,000th career RBI during the season.
Dunn increased his totals in every category last season after hitting .159 with 11 home runs, 42 RBIs, 75 walks and 36 runs in 122 games in 2011.