Fantasy baseball 2014 team previews: Oakland Athletics

Jim Johnson joins the Oakland bullpen after posting two-straight 50-win seasons for the Orioles.
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John Jaso, C -- With Derek Norris and Stephen Vogt sharing catching duties, Jaso becomes the regular designated hitter for the A's, which means he'll get a lot of at-bats, and he'll retain his catcher eligibility. But consider the fact that his slugging percentage (.372) in 2013 was lower than his on-base percentage (.387), and you understand why he's not necessarily the slugger you want in mixed leagues.

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