In 2013, fans saw two players who experienced extreme breakout seasons, one who saw it at a later age, and the other who saw it happen before he was of legal drinking age.
Josh Donaldson was once only thought of as a poor-hitting catcher. The A's turned him into a third baseman once they acquired him and, in 2013, he exploded for a monumental year hitting 24 homers and a stellar slash line of .301/.384/.499 with an OPS+ of 148. His performance saw him finish 4th in the AL MVP vote and helped the A's win another AL West crown.
Fernandez was the Marlins' top prospect entering 2013, until a stellar spring performance led the organization to believe that he was ready for the big leagues. It took a little seasoning, but Fernandez eventually dominated the opposition up until the Marlins decided to limit his innings and shut him down near the end of the season. His 187 K in 172.2 innings, 2.19 ERA, and overpowering stuff landed him the NL Rookie of the Year and a 3rd place finish in the NL Cy Young vote.
So the question is, in 2014, what guys will do what these two did?