※ 引述《SNSDpk5566 (5566 超強)》之銘言：
: 小弟不才 我記得我剛開始看 MLB 大概是2006
: 美聯投手ERA <3 就超強的
: 為啥 我覺得 越來越多人 ERA<3呢
: 我列出前10名的就好了
: 似乎 2010 年是個變化點
據說是因為好球帶變大了
http://tinyurl.com/cmwanjx
Year Called Strike Rate on Pitches Taken in Zone
2008 74.5
2009 76.3
2010 78.9
2011 79.1
Those extra strikes have massive effect over the course of a full season. The
difference between 2008's called strike rate on in-zone pitches taken and
2011's rate amounted to an extra 5,732 called strikes on hitters. The
difference between a called ball and a called strike is about 0.15 runs.
Multiply that by 5,732 and you have a nearly 860 run decrease compared to
2008's rate. That's 0.35 runs per game, or nearly the entire difference
between 2008 and 2011 run scoring.
多叫的好球數所造成的失分減少 幾乎等於08~11年的失分減少數字
這就是近年火力下降的隱藏原因嗎?