Sinker Release Points

After reading tonight's Cubs F/X post regarding Derek Lowe, it made me think about sinker ball pitchers. About a week ago while watching rookie Justin Masterson pitch, I decided to take a quick look at the release points of various known sinker ball pitchers around the league.Three questions keep popping up for me when looking at these numbers.1. Is this data skewed because of the various parks? A: Yes it is. I don't know how much though. Josh Kalk would be able to explain better.2. How much of this data is affected by differing mound heights at each park? A: I asked Mike Fast this a couple weeks back and he basically said the errors in last years data had much more to do with park inconsistencies than mound height. This is an unknown area still waiting to be explored.3. Is the release point data affected by where you stand on the mound? A: I haven't read anything on this, but my guess would be yes. Some pitchers like to stand on the right of the rubber, others lik...