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Morning Mound Visit: sabermetrics news - 9/28/18

Mookie’s historic season; the Cubs’ lack of sliders; modern GM candidates; baseball’s forms of uncertainty

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MLB: Baltimore Orioles at Boston Red Sox David Butler II-USA TODAY Sports

FanGraphs | Craig Edwards: By eclipsing 10 WAR, Mookie Betts moves into historic company by completing one of the greatest single seasons of all time. What was remarkable was not only how good he was, but by his, for example, 146 wRC+ with two strikes, something only seen a few times this century.

Baseball Prospectus | Matthew Trueblood ($): Baseball is moving to more and more sliders, except for the Cubs, who have the lowest slider percentage in baseball. With their pitching struggling in general, and with the league basically proving that this pitch is effective in this era, one would imagine they want a change in direction.

The Athletic | Eno Sarris ($): With Bobby Evans departing as Giants GM, the question arises... what do we look for in modern GMs? How fluent in scouting, or data analytics should they be? Sarris offers a few nominees with relevant experience, so it’s certainly worth a read.

Tangotiger Blog | Tom Tango: Tango breaks down uncertainty and how it applies to baseball in three, key ways: uncertainty in outcome (what if we added a larger sample size?), uncertainty in impact (how many runs is a home run worth?), and uncertainty in context (how is run creation impacted by ballpark, defense, weather, etc.?).