I think that OFers throw the most like Ps, which is why so often Ps are converted OFers. 3B also falls in that category due to the need for high velocity due to the longer throws. OFers especially are able to do this because they have the time to throw with proper mechanics. Most throws are done off of a crow hop, which gives your arm time to get up.
Originally Posted by Deezeldogg
This is less the case for SS, 2B, and C because you have to release the ball quicker (however, David Eckstein is an exception). This doesn't cause them many arm problems due to the lower velocities and reps.
Having said all of that, I try to teach all of my guys to throw with proper mechanics. Sometimes they have to shorten up to get the ball off quickly, but I still work with them on things like showing the ball to 3B and getting thumbs up sooner.
Just Google my name to find me.