Yesterday I took a look at how the Yanks’ minor league pitchers performed in 2008 using a new metric call Dominance Factor. DF was developed by Brett Sullivan of Project Prospect, and measures performance based on strikeout, walk and groundball rates, as well as age relative to level. I went through the whole schpeel yesterday, so I’m not going to explain everything again.
No one really separated themselves from the pack in 2008, but that certainly doesn’t hold true for 2007. Phil Hughes paced the organization with a score of 85.98, easily blowing by David Robertson’s organization leading 68.46 DF in 2008. The only pitcher within 23 points of Phil was Joba Chamberlain, who didn’t have anyone within nine points of him. Combining Joba’s High-A and Double-A stats (he only threw 8 IP in Triple-A, so I’m leaving that out), his aggregate DF in 2007 was 76.01, nearly ten full points behind Hughes. That’s kind of crazy. Oh, and looking at the list, is it safe to say that David Robertson has been the Yanks’ most dominant minor league pitcher over the last to years? I think so.
I’ll try to get to the 2006 numbers this week, but until then check out the really big table after the jump. (click for a larger view)