Why tinker with success? The Cardinals have won the division each of the past two seasons so there was no need to make major changes. However, the Cardinals aren't playing for NL Central championships, they want to win the World Series. St. Louis went out and a made a blockbuster deal to acquire Jason Heyward, hoping that adding one of the premier outfielders in baseball would help the Cardinals play deep into October.
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The Pirates are seeking to make the playoffs for the third consecutive year - a feat they haven't accomplished since the 1990, 1991 and 1992 seasons. Although the Pirates didn't major splashes, the team did acquire Korean infielder Jung Ho Kang and are also hoping 2015 a breakout season for Gregory Polanco.
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The Brewers made their biggest acquisition early in the off season when they traded for Adam Lind, who is just a year removed from hitting 23 homers. In addition to Lind, the Brewers will also look to Ryan Braun for offensive help as this appears to be the year he is finally healthy and no longer dealing with a nagging thumb injury.
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It may not have been the off season Reds fans had hoped for, but the team did address their left field concerns with the addition of Marlon Byrd. Cincinnati fans may have wanted an off season full of big deals, but instead the Reds were relatively quiet when it came to additions. Cincinnati traded away two of their better pitchers, but brough in some quality prospects as well.
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It's hard to find a team that had a more exciting off season than the Chicago Cubs. The Cubs two biggest moves were the hiring of manager Joe Maddon and the signing of free agent pitcher Jon Lester. However, those were not the only moves the Cubs made. Chicago also acquired a pair of new catchers - Miguel Montero and David Ross - a new centerfielder - Dexter Fowler - and will be much improved in 2015.