Comes with a sticker COA attached to ball and a matching paper COA from ONYX Authenticated.
Prior to the 2011 season, Sano was rated the third best prospect in the Twins' minor league system by Baseball America. Sano spent 2011 playing third base and shortstop for the Elizabethton Twins, the Twins rookie league affiliate in the Appalachian League, hitting .292 with 20 HR and 59 RBI. Following the 2011 season, Sano was rated the top prospect in the Appalachian League by Baseball America, the top Twins prospect by Baseball Prospectus and Baseball America, and the 18th best prospect in all of baseball by Baseball America.
Sano spent 2012 with the Class-A Beloit Snappers of the Midwest League. He transitioned fully to third base, and general manager Terry Ryan stated that the team hopes to move Sano closer to the major leagues soon. However, his developing defense and propensity for striking out have the Twins making sure not to rush his path through the minors. Sano hit .258 with a .373 OBP, and led the Midwest League with 28 HR and 100 RBI. Following the 2012 season, Sano was rated the second best prospect in the Midwest League by Baseball America, the second best Twins prospect by Baseball Prospectus, and the top Twins prospect by Baseball America. He was also rated the 12th best prospect in the game, as well as the top third base prospect, by MLB.com.
On June 9, 2013, Sano and Eddie Rosario were promoted to the New Britain Rock Cats of the Class AA Eastern League. He compiled 35 home runs, 103 RBIs, and a .280 batting average overall. At the end of the 2013 season, MLB.com ranked him as the third best prospect in the league, and second in the Minnesota Twins organization behind only Byron Buxton. The Twins invited Sano to spring training in 2014.