Mechanics Question on Catcher OBS

[mbyron]

I've never heard anyone say that they use the DDB signal. It's a dud.

I verbalize "That's obstruction!" at the time of the violation and point at F2. If you wait until after the play to announce the obstruction, you're asking for a world of shïte.

The BU should keep his mouth shut, as it's not EVER his call. Only time I can think that he might get involved is with a rookie PU, but even then I'd let it go and talk to him about it after an inning or two.