The gorilla arm really only affects base runners. Without any runners on your not likely to see it. If the pitching motion is not one continuous movement to pitch the ball, I suppose you could have some type of illegal pitch...but as you ask...a moving gorilla arm w/ no runners on base isn't going to have me calling anything.
as for your equipment question...i'm not sure, but I don't think I'm calling anything unless I'd have a lodged ball.
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It's like Deja Vu all over again
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