Heyward is interesting. His on-base skills are pretty awesome (even though they probably fall a bit going from the NL to AL). But he's going to get paid by someone based on defensive valuations and that team better hope they are measuring defense accurately. This article from the WSJ suggests they aren't. "Inside-Edge, a baseball analytics company that provides data to major-league teams, brings a big-data approach to scouting. Instead of just using a spray chart to calculate a player’s defensive value, their scouts watch every single play from every single team—twice. And by taking positioning into account in grading the difficulty of plays, Inside-Edge scouts not only found that the range of many players was being overstated, but so too was the overall importance of defense in preventing runs. The major revelation: The quality of a fielder doesn’t matter on most plays. Inside-Edge partner Kenny Kendrena says 24% of plays are almost always hits and 62% are almost always outs. The remaining plays where defenders can really distinguish themselves are so infrequent, he said, that the success in converting them can distort a fielder’s true skill." We saw this play out a lot this year with the Hunter debate, since the defensive stats hated him. Now the stats love Heyward. If they are right, Heyward is a consistent 6+ WAR player. If not, he's a 4 WAR player. That's still a really good player but not a guy who is going to turn your team around.