Marco Gonzales will report to Tacoma. Trade for O'Neill was move from position of strength (young OF) for long-term shortcoming (pitching).
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That's just dumb. There's no real problem swapping hitting for pitching, but pitching is riskier so plus hitters have more intrinsic value as prospects. If two pitchers are equally rated, the hitter should get more return. Now, O'Neill is a risky type of hitter but Gonzales has ripped his chest and blown out his arm already. He's one step from being Danny Hultzen and you're telling me you couldn't get him for anything less than O'Neill?
And let's not forget the reason Seattle doesn't HAVE starting pitching prospects is because they traded them away or bullpenned them. So now to make up for the fact that Seattle traded every top-10 arm they had in the minors except two (Neidert and Moore) they just beheaded their most-ready top hitting prospect with 70 power who is playing 3 years above his age level in order to add a potential #5 starter, or maybe middle reliever?
Genius.