8. Nolan Arenado(Colorado Rockies), 23
In his second season, Arenado became an All-Star third baseman for the Rockies. He also won his second Gold Glove in two seasons, a statistic unheard of for players coming straight from the minors. He is a defensive wizard who also added .020 points to his batting average. His stat line in 2014 was .287/.328/.500. He also hit 18 home runs.
Arenado will continue to grow as a hitter and could become the face of that franchise if Troy Tulowitzki cannot stay healthy. Playing at Coors Field 82 games a season has its advantages. Be prepared to hear a lot more about him in the near future.