And look at Jimmy Johnson's: Dave Wannestedt and Jack Del Rio(I think we can count because he played here for a bit under JJ and has emulated his coaching style and defense schemes). That tells you something, I think.
Well .. where do you start a tree then? Because wouldn't that make them both part of Green's tree, which mean Green has 9 (not counting Billick) in the NFL head coaching ranks? Where do you draw that line? Cam is where he belongs, developing QBs and offenses. Would Troy Smith beat out Flacco? That's who drafted him right?