3. Jacoby Ellsbury
The center fielder was the best offensive player in the American League in 2011 when he hit 32 homers and 46 doubles, had a .923 OPS, and stole 39 bases. But that brilliant season is sandwiched by two years essentially lost to injury. He played just 18 games in ‘10 after breaking his ribs, and a fluke shoulder injury derailed his ‘12 season. He played 74 games, but hit just four homers.
Ellsbury, a free agent after the season, has incentive to have a monster season.