I think ESPN has something on the ballparks, but that only runs throughout the season I believe.
You just have to realize that ballparks, although influential, will not make or break a guy. Only Coors Field has the ability to skew stats with any significance, and even that doesn't help a guy who's not a power threat to begin with. When you consider pitching a guy in Comerica or Safeco, or hitting a guy in Minute Maid, remember that it's just as likely that there will be no improvement at all. look at the overall picture.
What does help though, is more specific splits. For example, New York is not considered a top hitters park, but that short porch in right field is tantalizing for lefties. Knowing that, I picked up Travis Lee for one game last year, because I knew that he had insane numbers off of the righty, with that grandstand just over 300 feet away. Low and behold, Lee went 3/4 with a HR and helped me get a lead that I wouldn't relinquish.
It's that type of stuff that's usually more important. Don't start a bench player against Mark Prior at Minue Maid just because he's got a great home split at Minute Maid. Consider ballparks just one more piece of the gigantic puzzle.
Hopefully, this will post okay. These are ballpark factors sorted by Runs per game, HR per game, and Batting Average. Obviously, Coors Field tops the list and Dodger Stadium is at the bottom. There are some interesting parks that help batting average but hinder home runs. Kansas City has had a great hitter's park lately but they moved the fences back this year.
HITTERS PARKS Rnk Team Runs/Game HR/game BA 1 Colorado +3.40 (1st) +.839 (1st) +.443 (1st) 2 Arizona +1.93 (3rd) +.383 (4th) +.209 (3rd) 3 Texas +1.46 (4th) +.373 (5th) +.160 (4th) 4 Montreal +1.38 (5th) +.234 (t-8th) +.078 (8th) 5 Houston +0.83 (6th) +.234 (t-8th) +.104 (t-6th) 6 Toronto +0.68 (7th) +.132 (12th) +.053 (9th) 7 Pittsburgh +0.55 (8th) -.234 (22nd) +.104 (t-6th) 8 Chicago (AL) +0.29 (9th) +.659 (2nd) Even (t-10th) 9 Boston +0.19 (10th) -.242 (23rd) +.106 (5th)
NUETRAL PARKS Rnk Team Runs/Game HR/game BA 10 Milwaukee -0.09 (t-11th) +.234 (t-8th) -.026 (14th) 11 Atlanta -0.09 (t-11th) -0.21 (t-15th) Even (t-10th) 12 Cincinnati -0.18 (14th) +.531 (3rd) -.052 (16th) 13 Anaheim -0.19 (t-15th) -.154 (20th) Even (t-10th) 14 Minnesota -0.10 (13th) -.286 (26th) -.027 (15th) 15 Kansas City Moving fences back for '04, Data Unknown 15 Philadelphia New Ballpark, Data Unknown 15 San Diego New Ballpark, Data Unknown 18 Tampa Bay -0.19 (t-15th) -.373 (29th) Even (t-10th) 19 Cleveland -0.39 (t-17th) -.066 (17th) -.053 (17th) 20 New York (AL) -0.39 (t-17th) +.198 (11th -.080 (t-22nd) 21 New York (NL) -0.55 (t-21st) -.149 (19th) -.078 (t-18th) 22 St. Louis -0.55 (t-21st) -.213 (21st) -.078 (t-18th) 23 Florida -0.46 (t-19th) -.319 (27th) -.078 (t-18th) 24 Chicago (NL) -0.46 (t-19th) +.064 (14th) -.104 (24th) 25 Baltimore -0.68 (23rd) +.289 (6th) -.080 (t-22nd)
PITCHER'S PARKS Rnk Team Runs/Game HR/game BA 26 Oakland -0.78 (24th) +0.88 (13th) -.133 (25th) 27 Detroit -0.97 (25th) -.264 (t-24th) -.160 (t-27th) 28 San Francisco -1.19 (t-27th) -.744 (30th) -.078 (t-18th) 29 Seattle -1.07 (26th) -.264 (t-24th) -.160 (t-27th) 30 Los Angeles -1.74 (30th) -.021 (t-15th) -.209 (t-29th)
Roger Angell: I was talking with Bob Gibson and I said: 'Are you always this competitive?' He said: 'Oh, I think so. I got a three-year old daughter, and I've played about 500 games of tic-tac-toe with her and she hasn't beat me yet.'
Also remember, Montreal might be ranked #4 most friendly hitters park, but they play half of their home games in Hiram Bithorn stadium in Puerto Rico which may just be the most hitter friendly park, period. Interesting to see what Vlad's numbers will do without the friendly confines of Olympic Stadium and Hiram Bithorn.