Playbooks
Mtn 0 1 Trap is a run play out of Singleback Wing Flex that uses a trap blocking scheme to attack interior gaps with the HB. The offensive line lets the defensive tackle crash inside while a guard or fullback-type blocker traps him, creating a lane for the ball carrier to burst through the A or B gap. This is a run concept, not a pass or RPO, and the primary read progression starts with the trap blocker sealing the first defender inside the tackle box before the runner presses the hole and reads the second level linebacker flow to decide whether to cut backside or stick front side.
Watch for defensive tackles that are told to shoot gaps aggressively since this play is designed specifically to punish penetration with a trap block that turns their aggression into a wasted rush. If the user controls the Mike linebacker and sits patiently in the A gap without biting on the trap action, this play loses most of its explosive potential and you should check to a different run in the 0 1 Trap family. Look at the defensive line alignment pre-snap: an over front shading the play side tackle can clog the trap lane, while an under front tilted away often opens a bigger crease. Post-snap, key the safety rotation, since a quick downhill safety fill can limit this to a short gain even if the initial trap block executes cleanly. Base 4-3 and 3-4 fronts with linebackers stacked directly behind the defensive line are the most vulnerable, while gap-sound defenses that stay disciplined and do not overpursue the trap fake shut this run down.
Run this out of 12 personnel when you see base 4-3 or 3-4 fronts that are crashing hard upfield since the trap block feeds off aggressive defensive tackles shooting gaps.
Use pre-snap motion or a quick look at the Mike linebacker depth to confirm he is not sitting in the hole, since a stacked backer reading run fits kills the trap lane immediately.
Mix this with 0 1 Trap counterpart plays like Counter Weak and HB Zone Wk in the same set so defenses cannot key on gap direction based on your personnel or formation tendencies.
On early downs like first and ten, this play punishes teams that load the box with only five or six defenders since the trap creates a natural double team advantage at the point of attack.
If the defense shows a heavy blitz look pre-snap, consider hot routing the fullback or extra blocker to stay in and reinforce the trap block rather than releasing him into a route.