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If you were to change anything with Robles' mechanics then you run a great chance of him losing his #1 weapon; deception. As he throws right now, his pitches are very hard to square up (very high popup rate).
G_Money will probably turn blue in the face when he reads this, but I think that if Robles doesn't show a better ability to go deep into games by mid-season this year that he will be transitioned to the bullpen. There, he could become a shut-down closer.
Lonnie