Adam Eaton, Diamondbacks
The 5'8" centerfielder and leadoff hitter will be out till May with an elbow injury. But when he returns, the league will see a star in the making who had a .456 OBP at Triple A and stole 38 bases.
Paul Goldschmidt, Diamondbacks
A year after hitting 20 homers, he'll clear 30 if some of his 43 doubles turn into round-trippers. But don't call Goldy the next Rob Deer: He also hit .286 with 18 steals.
Kris Medlen, Braves
The Tommy John success story will be a full-time starter for the first time after dazzling in 12 starts last year (9--0 with a 0.97 ERA and 84 K's in 832/3 innings).