I initially created Baseball Graphs to develop new and better ways of presenting baseball statistics. The 2003 season was my first full-season attempt, and it turned out pretty well. I now spend a lot of my time creating and formatting the baseball stats at The Hardball Times.

Along the way, I've also picked up the writing bug. I spend most of my energy writing for THT, but sometimes I like to write about more geeky stuff, baseball research and things like that. That's what this blog is for.

I'm very interested in graphics and other information display, so I'll probably post links to creative stuff like that. I also plan to write historical articles that complement the historical graphs. And I have inexplicably developed an interest in baseball win-related stats, such as Bill James's Win Shares and something called Win Probability Added. So you can expect a few posts about that stuff too.

If you're interested, I've created a complex spreadsheet full of WPA logic, which you can download at ftp.baseballgraphs.com/wpa. If you'd like to read more about Win Shares, try these links:

Win Shares Intro
What They're Good For
Mathematical Details

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December, 2003
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To view a list of all articles, click here.

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If there is any aspect of WPA, Win Shares or baseball graphics you're interested in, drop me an e-mail and I'll look into it.

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AL Batting WSAA Rankings

November 15, 2003

Doh! I made a mistake, so here's a list of the top ten AL Batting Win Shares Above Average leaders (updated as of the 18th):

Name	Team	Win Shares	Game Shares	WSAA
C Delgado	TOR	30.9	21.5	20.2
M Ramirez	BOS	25.5	19.9	15.6
J Giambi	NYY	26.1	22.3	14.9
A Rodriguez	TEX	27.0	25.5	14.2
F Thomas	CWS	22.7	19.7	12.8
E Martinez	SEA	19.6	16.1	11.6
C Beltran	KC	22.2	21.3	11.5
B Boone	SEA	21.5	21.4	10.9
G Anderson	ANA	22.6	23.7	10.8
J Posada	NYY	20.4	19.7	10.6

And here's a link to all AL batting WSAA holders, ranked within team.

You can see how the WSAA rankings differ significantly from the WS rankings. Look at KC, for instance. Raul Ibanez created 12.2 batting Win Shares, but zero WSAA. On the other hand, Mike Sweeney created 14.4 and 6.2. KC followers probably knew that Sweeny added more value than Ibanez, despite his limited playing time, and now Win Shares reflects that.

Another example: Edgar Martinez and Brett Boone switched leader positions on the Mariners, thanks to Edgar’s much-lower out rate.

There’s a lot you can do with this data. For instance, if you feel that an appropriate replacement level is 80%, you can multiply the Game Shares by 40% to compute the batting Win Shares above replacement level. You may want to compute different replacement levels for different positions and different leagues. Go nuts.

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