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Regression's A Powerful Force

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No new ideas presented here. I just remember that, back when I was first learning about regression, one of the things that stuck with me was seeing how the top batting averages in the league in Year X looked in Year X+1, so here's a similar concept with a different, more contemporary statistic. What you see below are the top 20 players in WAR in 2008 and how they then did in 2009. Accompanying them is an old friend.

Laird_medium

Please try to keep this in mind if you notice that Franklin Gutierrez is having a tough time repeating as a superstar.