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Morning Mound Visit: sabermetrics news - 12/8/18

Patrick Corbin’s changeup to his slider; the death of the LOOGY; the player development revolution

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MLB: Colorado Rockies at Arizona Diamondbacks Joe Camporeale-USA TODAY Sports

FanGraphs | Jeff Sullivan: This is an incredibly cool piece. While in the past pitchers develop a change to their fastball, namely throwing at the same arm angle with a different velocity to fool hitters, Patrick Corbin has dome something similar with his slider, throwing a curve at the exact same arm angle but with a different velocity, thereby creating a change to his slider.

Baseball Prospectus | Russell A. Carleton ($): It’s very possible that LOOGYs are not as important as we thought. Even though the platoon effect is real, the real power from a LOOGY comes from the One Out part, where the pitcher can pour all of their energy into one batter. They often attack the hitter, and get more outs on balls in play. But a ROOGY would have largely the same effect on righties, and a pitcher with no platoon split would be able to get any batter out in just a single appearance.

The Athletic | Eno Sarris ($): Major League Baseball has largely capped its ability to spend on players, but not on personnel and technology. Player development is where the next Moneyball revolution is, and the important tidbit is that the Astros spend more on tracking equipment at Minute Maid than some teams do on their entire player development department. Teams are finding technological, statistical, mathematical, and just plain human ways to up player development performance, with results that trickle on to the major league field.