TBL Pitcher grade performance

At the draft, I got into a discussion about the relative value of left-handed and right-handed pitchers in TBL. Bob is of the firm opinion that lefties get skunked, and I suspect that many in the league share his view. But I took a quick look at TBL pitchers in 2006, and it looks like the effect might not be as large as some expect. Here are the numbers - I haven't studied them long enough for me to hear them speaking:



These are quick and dirty numbers. I ignored split-grade pitchers. I lumped starters and relievers together. I have ignored control and homerun ratings - I have that data, and it's all over the place, but it shouldn't affect hits per 9 IP. There’s not a lot of data at the tails. But looking at grades 6-15 or so, there doesn’t seem to be as much difference as I expected. Mostly, the righties are a little bit better, but sometimes the lefties are. Some graphs might be better illustrations:





I'll be doing the 2005 numbers soon.