A while back I posted the top 15 NL changeup pitchers from 2010 by wOBA. Here's a look at the top 20 in all of MLB.
I was curious how many pitchers from the above list ranked in the top 20 in changeup movement.
PVZ is the difference in feet per second of vertical movement on a pitch compared to league average (13 ft/s). Since we're dealing with changeups, each PVZ value above indicates how many additional ft/s over league average the pitch dropped.
Interestingly enough, only seven pitchers that made the top 20 in changeup vertical movement ended up placing in the top 20 in wOBA. This is likely an indication that while movement certainly contributes to the success of the pitch, it can't make up for a pitcher's inability to locate. How well a pitcher disguises his change and the deviation in velocity from his fastball are also big factors.