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Gordon, Spec and others have been enthused about D.J. Peterson. Dr. D has not. It's not that I've had anything against him; I just didn't get him. Just as in "not knowing much about him." Certainly the national sites have not hesitated to slot Peterson wayyyy high on the org list, often ahead of James Paxton (almost before Peterson played any pro ball).
Sabermetrics, as opposed to tools scouting, devotes its attention to performance history. It's not like Peterson's performance record exceeds Ackley's and Zunino's, or anything like that. And we hadn't had a chance to see him.
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Deconstructing Deej
The Seattle Times has a very fine highlight reel, or three, from Friday's game. By "very fine" we mean "lots of different highlights, from a good angle." We were able to extract half-a-dozen stills on D.J.'s homer swing, which ain't bad as far as video quality from an early-March game.
Go take a look at D.J.'s swing, starting at the 1:45 mark on the last video. What do you see?
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WAIT! We better initialize your system before we start coding. Here is a Dustin Ackley groundout from the same game. The point? It's one thing to have a pretty swing against the bathroom mirror. It's another thing to have a pretty swing when an enemy pitcher is trying to kill you in 0.4 of a second.