Mar 2, 2014; Melbourne, FL, USA; Washington Nationals starting pitcher Doug Fister (58) pitches in the first inning as the Nationals beat the Miami Marlins 10-3 in a spring training exhibition game at Space Coast Stadium. Mandatory Credit: David Manning-USA TODAY Sports
It doesn’t sound like it’s a huge big deal at the moment — the indication is that Fister would have continued to pitch if it was the regular season — but you’re never comfortable with a pitcher who’s reporting elbow trouble.
Fister missing any chunk of the season with arm troubles would changer the calculus of the trade in hindsight, but hindsight isn’t generally a good way to evaluate trades (because you can only trade based on what you know — or should know — at the time of the deal). There aren’t any indications that the Tigers were concerned about Fister’s physical health going into the offseason (and he didn’t miss a lot of time as a member of the Tigers), so this just looks like a bit of bad luck for Washington.
Either bad luck or nothing, depending on the eventual length and severity of the “injury”. It might just be something that goes away with a little bit of rest.