Didn't come into play, but...

[MD Longhorn]

Originally Posted by mbyron

Sounds more like making up rules.

The rule specifies that interference with a thrown ball must be intentional, not that it's to be called whenever someone fails to make a "baseball play."

I think he's really trying to say that if the arm movements are not natural to the play, his assumption is far more likely to be that the arm movements are intentional, and an attempt to interfere with the throw. If, however, the arm movements just look like a kid protecting himself, the tendency would be to assume just that - he's not trying to interfere, he's just protecting himself.

I didn't think he was inventing anything ... just perhaps not completely explaining his meaning.