I guess the default would be a fair ball, but its not really a default call as the PU should have at least a guess at fair/foul
If I'm in your position, I'm moving like its a fair ball until I hear the PU say "FOUL." Until that time, I'm begining to move inside cause I'm assuming that we have a base hit down the line.
After the play, I'm gonna help my partner by keeping the assist coaches away while the head coach discusses the call with him.
