Backswing hit the catcher on a steal attempt

[Steven Tyler]

Originally Posted by bob jenkins

And, fwiw, umpires who start with FED and then move to OBR are just as mystified by the difference. They don't understand why a batter wouldn't be responsible for his follow-through and why the offense isn't penalized for the action. (Batter swings and falls over the plate -- get the second out; batter swings and contacts the catcher with the follow through -- return the runner. Why the difference?)

I believe the difference is that one is considered "full blown" interference and the other is "weak" interference.

FED is just a different animal altogether with it's rule set.