Back Judge

[ABoselli]

I would just add that although the TE is the BJ's key most of the time, his primary key can be the outside reciever on a formation with two recievers outside the tackle and also in a 'trips' formation. The wing would have the initial action on the inside reciever.

For area of coverage, I envision a triangle whose top point is the ball and extends to each corner of the end zone. Shade that in and that's the BJ's responsibility.