Seam

Vertical sprint from a slot or TE alignment, splitting the deep safeties. No hard break — slight inside release, then sustained vertical. Beats Cover 2 (gap between safeties) and Cover 4 (vertical the safety can't carry). Foundation route in 4 verts.

Demo rendered on @X (outside WR) at 18yd depth. Only the route runner and the QB are shown so the break stays the focus; the same route family scales to any depth a play calls for, and concepts that use this route may set a different depth.

Concepts that use this route: Four Verticals, Dagger