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Reddit mentions of Smart Baseball: The Story Behind the Old Stats That Are Ruining the Game, the New Ones That Are Running It, and the Right Way to Think About Baseball
Sentiment score: 1
Reddit mentions: 2
We found 2 Reddit mentions of Smart Baseball: The Story Behind the Old Stats That Are Ruining the Game, the New Ones That Are Running It, and the Right Way to Think About Baseball. Here are the top ones.
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Specs:
Height | 9.25 Inches |
Length | 6.25 Inches |
Number of items | 1 |
Release date | April 2017 |
Weight | 0.9 Pounds |
Width | 1 Inches |
Keith Law. https://www.amazon.com/Smart-Baseball-Behind-Ruining-Running/dp/0062490222/
u/sigbox here is a reply for now from my partner:
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Win Probability Added (WPA)
We will be publishing a full article comparing the WPA statistic with the RunPlusMinus RPM statistic.
Wikipedia defines WPA as a sport statistic which attempts to measure a player's contribution to a win by figuring out the factor by which each specific play made by that player has altered the outcome of a game. Fangraphs gives a good description of the WPA statistic here and contains references to related articles. As well, Keith Law’s book “Smart Baseball” devotes a whole chapter to WPA.
The RPM statistic measures the contribution of every player’s involvement in every play relative to the historical average contribution of a player in the same role in that game situation. The most succinct way of comparing WPA and RPM is to show the differences when considering their respective adherence to the 5 “CRAZI” principles described in the post “The Best Baseball Statistic”. These are summarized in the table below. The forthcoming article will provide much more detail on each principle.
|Principle|RPM|WPA|
|:-|:-|:-|
|Comprehensive|Yes (all players & events)|No|
|Run-Based|Yes|No (win based)|
|Additive|Yes (player & team)|Yes* (player only)|
|Zero-Sum|Yes|No (average is zero)|
|Independent|Yes|Yes|
The applications of RPM are more extensive than those of WPA. Specifically, RPM results can be used to: assist in-game decision making, predict game winners with more than 50% accuracy, forecast team standings, suggest fair salaries, rank all players and teams on both total and component (batting, running, pitching, fielding) performance.
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I hope that helps!
- Ivan