Originally Posted by Boomer
A QB that "looks" like is is running but then throws the ball ALWAYS has to be behind the line of scrimmage...otherwise he can't throw the ball...
exactly, and that is the point . . . when the QB is behind the LOS and runs there is risk that he might still pass the ball and thus be deemed a QB, and a defender needs to be on the look out for this and willing to accept the ruling of the QB is later deemed to be a QB, it best to be save to think of him as a QB till he crosses the LOS. . .
once he crosses the LOS and can't throw the ball and thus can not possible be deemed a QB, he can only be a runner and one can have more of a free reign with his tackles. . .