Verducci Effect 定義：25 歲以下投手，投球局數比前一年多 30 局以上
以下是局數增加前十名 (包含季後賽跟AFL)：
Pitcher Age IP Increase (2008 to 2009)
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Cesar Carrillo, SD 25 160.2 +84.1
Bud Norris, Hou. 24 175.2 +73*
Mat Latos, SD 22 123 +66.2
Joba Chamberlain, NYY 24 163.2 +47.2*
Homer Bailey, Cin. 23 203 +55.1
Josh Johnson, Fla. 25 209 +52*
Rick Porcello, Det. 21 170.2 +45.2
Max Scherzer, Det. 25 175 +42
Felix Hernandez, Sea. 23 238.2 +38
Wade Davis, TB 24 195 +35.1
* 舊單季局數紀錄不是出現在 2008
2009 名單：
2007 to 2008
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Dana Eveland (age 25), +151.1
Gregory Reynolds (23), +74.2
Charlie Morton (25), +74
Jon Lester (25), +74
Cole Hamels (24), +72.1
Chad Billingsley (24), +65.1
John Danks (23), +62.2
Matt Harrison (23), +51
Tim Lincecum (24), +49.2
Mike Pelfrey (24), +48
Clayton Kershaw (20), +47
Jair Jurrjens (22), +45
Matt Garza (25), +38.1
Brandon Morrow (24), +32
http://tinyurl.com/ya5zgzy
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