ESPN and RotoWorld Park Factors

Recently Aaron Gleeman, a writer and analyst whose work I enjoy and respect, posted an article that ranked the Major League Baseball Park Factors. It was a bit unusual. It does not match ESPN's, at all. I have no idea what either site did to calculate their version and I'm really not interested in doing it myself. I like using and looking at the numbers --not crunching them. My gut says to go with ESPN's since they fit my subjective sense of the rankings. But that isn't very logical. So, what to do...

Also interesting is this SeamHeads.com article that attempts to find truer park factors. It comes with a link to an excel file of more than 50 years of data that I haven't made much sense of yet.

Roto World:

Boston Red Sox – 108
Colorado Rockies – 107
Arizona Diamondbacks – 107
Chicago Cubs – 106
Chicago White Sox – 105

Cincinnati Reds – 104
Philadelphia Phillies – 103
Baltimore Orioles – 103
Tampa Bay Rays – 103
Cleveland Indians – 103
Los Angeles Angels – 103

Detroit Tigers – 102
San Francisco Giants – 102
Texas Rangers – 101
Washington Nationals – 101
Los Angeles Dodgers – 100
Milwaukee Brewers – 100

Houston Astros – 99
Toronto Blue Jays – 99
Florida Marlins – 99
Atlanta Braves – 99
St. Louis Cardinals – 99

Kansas City Royals – 97
Seattle Mariners – 96
Pittsburgh Pirates – 95
Minnesota Twins – 93
Oakland A's – 93
San Diego Padres – 89

And then ESPN's

Rk	Park Name	Runs	HR	H	2B	3B	BB
1	Rangers Ballpark (Arlington, Texas)	1.142	1.229	1.070	1.042	2.227	1.030
2	Chase Field (Phoenix, Arizona)	1.135	1.068	1.072	1.242	1.406	0.955
3	Coors Field (Denver, Colorado)	1.126	1.299	1.098	1.048	1.387	0.919
4	U.S. Cellular Field (Chicago, Illinois)	1.122	1.353	0.974	0.907	0.564	1.087
5	Fenway Park (Boston, Massachusetts)	1.077	0.850	1.056	1.589	1.000	1.095
6	Comerica Park (Detroit, Michigan)	1.077	1.188	1.074	0.972	1.114	0.877
7	Great American (Cincinnati, Ohio)	1.069	1.230	1.010	1.017	1.038	1.013
8	Wrigley Field (Chicago, Illinois)	1.068	1.163	1.032	0.975	0.658	0.939
9	Turner Field (Atlanta, Georgia)	1.063	1.014	1.068	1.028	1.206	1.109
10	Camden Yards (Baltimore, Maryland)	1.051	1.359	1.044	0.989	0.566	0.948
Rk	Park Name	Runs	HR	H	2B	3B	BB
11	AT&T Park (San Francisco, California)	1.045	0.992	1.014	1.132	1.875	1.029
12	Yankee Stadium (Bronx, New York)	1.040	0.982	0.980	0.997	1.045	1.000
13	Nationals Park (Washington, D.C.)	1.038	0.942	1.014	1.013	1.101	1.009
14	Minute Maid Park (Houston, Texas)	1.036	1.155	1.012	1.102	0.908	1.002
15	Citizens Bank Park (Philadelphia, Pennsylvania)	1.029	1.022	1.036	0.957	0.743	0.991
16	Angel Stadium (Anaheim, California)	1.017	0.933	1.028	0.993	0.828	0.807
17	Progressive Field (Cleveland, Ohio)	0.995	0.824	1.020	1.016	0.654	1.187
18	Rogers Centre (Toronto, Ontario)	0.959	0.926	0.981	1.086	1.864	1.102
19	Tropicana Field (St. Petersburg, Florida)	0.955	0.850	0.934	0.813	1.226	1.043
20	Dolphin Stadium (Miami, Florida)	0.954	0.844	0.946	0.926	1.481	1.025
Rk	Park Name	Runs	HR	H	2B	3B	BB
21	Shea Stadium (Flushing, New York)	0.946	1.081	0.926	0.935	0.500	1.088
22	Miller Park (Milwaukee, Wisconsin)	0.945	0.893	0.963	0.857	1.375	1.130
23	Busch Stadium (St. Louis, Missouri)	0.943	0.915	0.962	0.868	1.000	0.969
24	Safeco Field (Seattle, Washington)	0.932	0.900	0.992	0.921	1.222	1.021
25	Kauffman Stadium (Kansas City, Missouri)	0.929	0.788	1.003	1.097	0.816	0.980
26	McAfee Coliseum (Oakland, California)	0.916	0.988	0.960	0.953	0.536	0.974
27	PNC Park (Pittsburgh, Pennsylvania)	0.898	0.869	1.024	1.064	0.929	0.977
28	Metrodome (Minneapolis, Minnesota)	0.887	0.896	0.941	0.989	0.960	0.844
29	Dodger Stadium (Los Angeles, California)	0.842	0.857	0.892	0.866	0.425	0.891
30	Petco Park (San Diego, California)	0.796	0.743	0.896	0.780	0.931	1.024

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