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Maybe this is common knowledge, or maybe it is just absurd, but are changeups the most effective off-speed pitch?
I've watched a whole summer of Vargas and now Ramirez embarrass hitters with a change that dives into the dirt. It seems that curves and sliders often get botched, hanged and then hit for extra bases, but the changeup rarely goes wrong and seems just as effective when it goes right. Maybe the curve and slider are more difficult to throw and more unreliable because they rely heavily on a hard spin for the ball.
Is this right baseball thinking?