Odubel Herrera (.286 BA, 87 runs, 15 HR, 49 RBIs, 25 SBs) was supposed to be the team's future center fielder but with his struggles in the second half, both in the field and at the plate, he's no longer a lock. Being injured for the better part of the year gave other young outfielder Aaron Altherr little time to prove anything. After struggling offensively the first half of 2016, shortstop Freddy Galvis (20 HR, 17 SBs) and second baseman Cesar Hernandez (.294, 17 SB, 13 CS) came on strong, making adjustments in the second half, but we still don't know if they can do that over a full season, or multiple years.