Purpose Stretch the right side with a corner, an intermediate out and a short flat. Each route must keep its own depth so one defender cannot sit between two receivers in the same window.
QB key checks high when the deep window is available, then on the out, then underneath. Read the underneath defender's depth as well as the deep coverage. 's drag is a short option if it clears in time; it is not an automatic answer to every blitz.
Assignments
Coach it Walk the three levels, then add a flat defender and a deep defender. Teach the lower-versus-middle decision before emphasizing the corner throw. Install protection and pressure adjustments before live team reps.
Watch for A deep defender staying over the corner, an underneath defender carrying the out, or a compressed field. Take the short completion when it is available; no coverage label guarantees the high throw.