Outside Zone
Stretch the defense horizontally, then cut back
Outside Zone (also called "stretch") uses the same covered/uncovered zone-blocking principles as Inside Zone but with wider, more aggressive lateral first steps. The running back aims for the playside tackle's outside hip and follows a "bang, bend, bounce" progression — hitting the first crease available inside, bending back if overpursued, or bouncing to the perimeter if the defense flows too far inside. The play stretches the defense horizontally and punishes any defender who over-commits to one gap. It is the cornerstone of the Shanahan coaching tree and the foundational play of Kyle Shanahan's 49ers offense.
Blocking Assignments
All five offensive linemen take aggressive lateral zone steps toward the playside. The aiming point for each lineman is the outside number of the playside defender. Covered linemen execute reach blocks — working to get their helmet past the defender's playside shoulder. Uncovered linemen help on the nearest backside DL in a combo block, then peel off to the second level. The key distinction from Inside Zone is the wider first step and the emphasis on getting bodies to the playside edge. The tight end or H-back often serves as an additional playside blocker, sealing the edge defender.
Running Back Read
Aiming point is the playside tackle's outside hip. Follow the "bang, bend, bounce" read progression: (1) BANG — if the first crease opens inside the tackle, hit it immediately. (2) BEND — if the defense flows to the playside but the backside combo creates a cutback lane, plant and bend back to the inside gap. (3) BOUNCE — if the defense pinches inside, take the ball outside the last blocker to the perimeter. The key is patience at the mesh point and one decisive cut.
Why It Works
Outside Zone forces every defender to run laterally, which spreads the defense thin and creates cutback lanes. Defenders who over-pursue get cut back behind; defenders who stay home get outnumbered at the point of attack. The horizontal stretch naturally pairs with play-action bootleg — when the backside DE chases the stretch, the QB fakes and rolls naked behind him for easy completions.