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3B Josh Vitters
Biggest Weakness: Third base
The Cubs are still in the early stages of a wide-scale rebuild, but they did a nice job improving their rotation in the short term this offseason after the staff was downright terrible last season.
Outside of the staff, they have young, core players or decent stopgap veterans at every position outside of third base for the coming season (and catcher, but Welington Castillo has a chance to be a core guy).
After taking a chance on Ian Stewart bouncing back last season and watching him play just 55 games and hit .201, the Cubs opted to give him another go on a one-year deal.
He'll platoon with Luis Valbuena, who hit .219 while receiving the bulk of the at-bats last season as the team continues to hope Josh Vitters will be the long-term answer. He certainly didn't look like it in a late-season audition last year, hitting .121 and striking out 33 times in 99 at-bats.
They got a solid third-base prospect from the Rangers in Christian Villanueva for Ryan Dempster, and top prospect Javier Baez may still wind up playing third in the majors, but for now the team will just have to muddle through another season of the above mentioned trio of guys.