Favorite Sabermetric Article/Research

[A's GM (Justin - Commissioner)]

If you want, point out your favorite (or top few favorites) article or piece of research you've seen done on baseball. Can be related to anything.

Mine are:

Using Batted Ball Data in Scouting (Jeff Zimmerman)

Pitches in Radar Gun are Slower than they Appear (Ben Lindbergh)

Ultimate Bullpen Guide: Arsenal Score, xBABIP & Rankings (Daniel Schwartz)

These articles among many others are all great examples of sports data analytics. 

[Rangers GM (Kaz)]

There're too many, but off top of my head: www.baseballprospectus.com/article.php?%20articleid=4464