In a vacuum, you could probably make a decent enough case in favor of exchanging Alex White for Wilton Lopez. As Jeff wrote last week, Lopez is the game’s most extreme high GB/low BB reliever, and this skillset allows him to be an effective late-inning reliever. Lopez is a quality arm, and he can be a key piece of a good bullpen. Meanwhile, White has been pretty lousy during his first 150 innings in the big leagues, and there’s a decent chance that he ends up in the bullpen himself. As one person noted to me on Twitter last night, the Rockies traded a guy I’ve projected as a reliever in the past for a better reliever.
There’s just a few problems here. The primary one regards the health of Lopez’s right arm. The reported deal with the Phillies that never materialized last week apparently included Philadelphia having some significant concern over his elbow, and a couple of folks here in Nashville have said that Lopez flunked a physical at the trade deadline that nuked a trade for him back in July. When there’s smoke, there’s often fire, and the fact that Lopez spent a month of the 2012 season on the DL with an elbow issue suggests that there’s almost certainly something there worth worrying about. Without access to the medical information and people who can intelligently interpret it, we can’t say to what degree Lopez is damaged goods, but it is clear that other teams have serious concerns about how long Lopez’s elbow is going to last before he needs surgery.
However, predicting injuries isn’t something anyone has mastered, so let’s just assume for now that Lopez is going to stay healthy. Even with that assumption, it’s not clear that this is a significant upgrade for Colorado relative to simply shifting White to the bullpen.
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