Obstruction -

[Thane Yennie]

I like that idea. but what if the runner is two steps away and the ball is right on his keester? I would say the catcher is in the act of fielding and has a right to be there. I have heard any thrown ball within the arc of the pitcher's plate from foul line to foul line (takes about 2 seconds to travel that distance)is legitimate distance for the catcher to pitch a tent.