[閒聊] Manny 跟 Teixeira
Tango利用wOBA來算每個人對球隊的貢獻度
WAA (Win Above Average)是:
(Player wOBA - relapcement wOBA) / 1.15x700/10.5
1.15是wOBA和得分的相關轉換係數;
700是打滿162場約略的打席數;
10.5則是得分和勝場間的轉換係數。
WAR(Win above replacement )
WAA + 守備位置調整(1B:-1.0 LF:-0.5) + 聯盟調整常數(AL跟NL不同 AL:2.5 NL:2.0)+
守備調整(根據該球員的守備評價作調整)
WAR是甚麼呢?代表一個球員打滿162場能比Replacement player多對球隊貢獻幾勝?
wOBA我取Stat Corner的資料,我只算鐵爺到天使與Manny躲人的成績
Teixeira:
WAA=(0.463-0.338)/1.15*700/10.5=7.25
WAR=7.25+(-1.0)+(2.5)+(0.5)=9.25 (考慮到鐵爺在一壘手防守不錯)
而鐵爺在天使貢獻了234個PA 在天使打席裡貢獻的WAR=9.25*234/700=3.09
Manny:
WAA=(0.492 - 0.338) / 1.15x700/10.5= 8.93
WAR=8.92 + (-0.5) + 2 + (-0.5)=9.93
Manny則在躲人貢獻229個PA 再躲人打席裡貢獻的WAR=9.93x229/700=3.25
Manny比較好是沒錯啦,但我看不出有差很多嗎?
還是說WAR差個0.7在某人眼中是天與地的差距?
我又用Marcel projection來算2009年的成績
鐵爺wOBA 0.386
MannywOBA 0.389
假設他們都在AL
鐵爺WAR=4.78 Manny WAR=4.45
鐵爺還比較高勒 科科 剛剛說鐵爺比Manny弱很多的快給我出來阿 嗯哼!?
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※ 編輯: pikachu123 來自: 125.224.1.140 (12/19 00:57)
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