[Jim Porter]

You know, I'm thinking about this even more because I'm perplexed, and I can even remember learning the mechanics quite clearly. Not only was I taught to clear the catcher and move up the third base line as PU, but I was also taught as BU not to drift and anticipate the back-end of the double play so that I would be in position to see and call any possible interference.

I've never heard of a PU clearing the catcher and coming out to the pitcher's mound. I've also never heard that the PU's responsible for interference on the front end of a double play. Both of those are news to me.

Is this a result of me coming from a backward OBR state? Or have I been doing it wrong for 20-something years?