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THE BOOK--Playing The Percentages In Baseball

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Thursday, September 03, 2009

What about if a team has 97 wins in one year, and then gets better?

By , 09:35 PM

This is like the thread on the player who is now healthy.  I realize that the answer is trivial (to us at least).  However, some people, like Rob Neyer (I haven’t picked on him in a while), like to say something like, “Well, so and so team had 90 wins last year and they added 2 wins in personnel, so they should be a 92 win team now.” Those kind of statements and that kind of analysis bugs me (like 3,478 other things do).

So if a team wins 97 games one year and then improves its team by 3 wins, how many wins so you project for it the next year?

How about this 100% correct statement?  If I said this to Joe Morgan, would it blow his mind? 

“Well, Joe, here is my analysis.  As you know, I am a professional sabermetrician and I actually get paid, sometimes by MLB teams, to figure out this stuff.  Anyway, Joe, that team won 97 games last year and they got a lot better this year as we all know.  So, let’s see, I project them to be a lot worse next year than last.  What about you?”

(Sound of Joe’s head hitting floor...)

(11) Comments • 2009/09/06 • SabermetricsForecasting
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September 03, 2009
What about if a team has 97 wins in one year, and then gets better?