this isn't as cut and dry as it probably should be, but I was under the impression that if a quarterback throws forward, that's a pass, and if he hands off or throws backwards, that's a run -- and if the ball gets knocked out of play in that scenario it's a fumble, not an incomplete pass.
that being said, why is there terminology present that's stating that a receiver is a "runner" when the ball was thrown forward, thrown being the key word, to a wide receiver?
you all and I both know that if the shoe were on the other foot they would tell the Bears to pound sand.