The way it has been told to me...PU has until the running lane begins, then BU picks it up. If swipe is in the back of the runner the BU and PU have to read each other. If BU can't see the tag PU should make a call. You can get together after the play is over to figure out what each other saw. Gotta make a call quick though when play is happening.
PU has the call at 3rd so he has to bust butt to get there after trailing BR.
SOmeone correct me if I'm wrong, like you wouldn't anyway
