Jackie Bradley Jr.
Bradley, who entered the 2013 season having played just 61 games above Single A, was the victim of unrealistic expectations after earning a spot on the opening day roster with a torrid spring training (.419 in 62 plate appearances). He was back and forth between Boston and Pawtucket during the season, hitting .189 in 107 plate appearances in the majors.
His struggles last year have led to him being underestimated now. Bradley is already a Gold Glove-caliber center fielder who will be a quintessential No. 2 hitter in his prime. He may not hit for a high average right away, but he will be an asset immediately as he replaces Jacoby Ellsbury.