Previously, I had always been under the impression that a person's PAP was unique to them and their release, and would be identical regardless of the ball being thrown.  However, last night during a practice / coaching session, I found that not to be the case.  On my DT American Eagle spare ball, I traced out the track and measured a PAP of 5 13/16" over and 7/8" up.  I put tape on that spot and threw it multiple times, confirming that was indeed my PAP.  Even had others watch to verify.  Based upon that measurement, I had been laying out my other equipment.    

Last night during practice/coaching, I decided to put a piece of tape on the Nebula I was throwing.  Measured out the 5 13/16" over and 7/8" up and threw the ball.  The tape wasn't even remotely close to my PAP.  After making adjustments to the tape to find the PAP, it measured out being 5 3/8" over and about 1/4" up.  

Thinking that I was somehow throwing the two balls differently (even though they are drilled identical), I had my coach perform the same exercise with his spare ball (Viz-A-Ball) and two strike balls.  His spare ball was 6 1/4" over and 5/8" up, but both his new Gladiator and Cobalt Solid were 5 3/8" over and 3/8" up!  Maybe even more odd is that when I threw his equipment (slightly longer span and larger thumb), the marked PAPs were identical for me as well.

So, it seems (at least from our simple tests) that the particular ball can have a substantial influence on PAP.

S^2


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“You can be with the guy and in his ear 24 hours a day, but at the end of the day you can’t be there the whole time.”
- Another Gem from Emmitt Smith 5-6-08