Monday, July 30, 2012

Cool Graph

Check out this chart I've been putting together.  Interesting slopes.  The Pirates's run differential took a much longer time to go positive than their winning percentage.  What does that mean?  Well, generally speaking, run differential is actually a better indicator of how good a team really is, compared to wins and losses.  So, when you're winning games by 1 or 2 runs, but losing games by 4 or 5 runs, you're probably not as good a team as your record might indicate.  

What does it mean though???
The green line indicates approximate playoff pace -- based on 90 wins being a playoff team.  Wins is all that really matters in the long run, but when it comes to the "long run," run differential is a better predictor of how many wins you're going to have.  

A team's Pythagorean winning percentage can be calculated based on how many runs they've scored and allowed.  Using a Pythagorean formula projection, you can plug in a team's current totals and get a decent prediction for the rest of the season.

What does the formula predict for the Pirates?  90 wins.  Exactly 90.  That's playoff bound...

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