Hat tip for Gaslamp Ball, who posted about this first.

A math professor used a method called Chernoff Faces to make faces for baseball's managers based on how they use things like defensive subsitutions/platooning/baserunning and so forth.

 http://www.nytimes.com/2008/04/01/science/01prof.html?ex=1364702400&en=c8f70d006f87dbd9&ei=5088&partner=rssnyt&emc=rss

Key is at the bottom, John McLaren is 2nd row, right-most face.

via assets.sbnation.com

Apparently those horns mean he uses a lot of pinch-runners, and small everything else means he rarely does any of the other things that were measured.