4. Jorge Polanco SS: Twins fans got a brief glimpse of Polanco last season in an emergency role when he was called up to Target Field. There are questions about whether or not he can play the position at the big league level, but his bat should keep him competitive. While Danny Santana is penciled in as the Twins starting shortstop, Polanco has a significantly higher ceiling than utility man Eduardo Escobar, and could push for playing time if the latter struggles. I would expect most of 2015 to be split between Double and Triple-A for Polanco.