Not so great, and a very small sample:
28 starts, $280k in earnings for $10k/start.
If you go to
http://www.equibase.com/stats/View.cfm?tf=year&tb=trainer you can play around with various filters for stakes/graded/surface/years/etc.
If you isolate for dirt and synthetic (can\'t take out synth, it\'s either all (which I used in my previous post), turf, or dirt + synth), you get these numbers this year:
6 Kiaran P. McLaughlin 196 $31,373 18%
7 Chad C. Brown 128 $30,251 30%
8 Bob Baffert 268 $29,977 28%
9 James A. Jerkens 91 $29,214 22%
Which, IMO, just makes it clearer that BB is the best dirt trainer in the country. He starts far more than others around the same $ win rate, wins at nearly as high a % rate, and wins nearly as much money per start in spite of competing for much less. (Desormeaux is 10th on this list, 127 starts and $27.1k per, given the purse disparity you can make a pretty strong case he\'s next best...)