Pato Lock

What This Is

The Pato lock is an ankle and lower leg compression submission applied from ashi garami (POS-LE-ASHI) and outside ashi garami (POS-LE-OUTSIDE-ASHI). The attacker wraps both arms around the opponent’s ankle and lower leg and uses a body drive and rotation to apply extension and compression force to the ankle joint and Achilles tendon — the same mechanical target as the tren lock.

This page exists because the entry path is distinct. The Tren Lock is entered from the truck position (POS-LE-TRUCK) and back control — the attacker is behind the opponent. The Pato lock is entered from ashi garami positions — the attacker is in front of and entangled with the opponent. Same mechanical target (ankle in extension and rotation, loaded against the arm wrap), different positional origin, different body geometry during the attack.

This is an opportunity to observe how the site’s invariable-based framework operates: the mechanical truth — ankle loaded in extension through an arm wrap around the heel, force driven by body movement — holds regardless of how the attacker arrived at the ankle. INV-LE03 and INV-12 apply to both the Pato lock and the tren lock. The position-agnostic nature of the mechanical principle is the point. The craft difference between the two techniques lies entirely in the entry path and the body orientation during the attack.

Safety First

The Invariable in Action

The Pato lock is applied from ashi garami positions, which require inside space control to be maintained. Losing inside space during the arm wrap entry allows the defender to pull their leg free before the wrap closes. The ashi garami positional base is not separate from the submission — it is the structural requirement that makes the submission available. Inside space first; arm wrap second.

The arm wrap in the Pato lock is the connection mechanism. Unlike the standard ankle lock, where hip extension creates the force, the Pato lock’s arm wrap must maintain body-to-ankle contact throughout the finish. Any space that develops between the arm wrap and the heel — the wrap migrating up the calf, or the elbow losing contact with the heel — reduces the extension force and may allow the ankle to escape the wrap.

Ashi garami positions provide primary leg isolation through hip-to-hip contact and inside space control. The Pato lock adds the arm wrap around the ankle as a secondary isolation mechanism — the leg is now controlled at both the hip (by the entanglement position) and the ankle (by the arm wrap). This dual control is what makes the finish completable against a resisting opponent.

The attacker’s body is the fixed point: the arm wrap drives the ankle against the attacker’s hip/torso through body movement. The body drive — rolling or rotating away from the defender — creates extension force through the arm wrap with the attacker’s body as the anchor. Losing this body anchor (the attacker’s body moving away from the ankle rather than driving through it) collapses the submission.

The angle of the arm wrap around the ankle determines which structures are loaded in the Pato lock. A wrap that captures the heel — the near arm under the heel bone, the far arm across the shin — creates a different extension direction than a wrap that sits mid-calf. The near arm under the heel is the critical angle: it sets the lever’s contact point so that body drive produces extension-with-rotation through the ankle rather than pure Achilles tendon loading. Wrap migration up the calf shifts this angle and changes which structures bear the load. This is why the arm position on the heel is non-negotiable rather than approximate.

Defence and Escape

We cover defence before attack. Understanding what is being done to you is the prerequisite for using this technique responsibly.

The escape principles

Defending the Pato lock from ashi garami positions requires addressing both the entanglement position and the arm wrap. Addressing only one is insufficient: breaking the arm wrap while remaining in ashi garami leaves the inside heel hook and ankle lock family available; breaking the entanglement without addressing the wrap allows the attacker to maintain the ankle control from a different body position.

Escape from the Pato lock

Fight the arm wrap before it closes: The window to prevent the Pato lock is during the arm wrap entry — before both arms have closed around the ankle. Reaching back to knock the first arm off the ankle before the wrap closes is the highest-percentage defence. Once the wrap closes, escape requires either leg extraction (which requires breaking inside space control first) or rolling to create slack in the wrap.

Use the free leg to push: The free leg pressing against the attacker’s shoulder or head disrupts the body connection that drives the extension force. This is not a direct escape but a disruption — it reduces the extension load while the main escape is executed.

Roll toward the attacker: Rolling toward the attacker (into the entanglement, not away from it) creates slack in the arm wrap by reducing the extension angle. This is the same principle as the standard ankle lock escape. Rolling away increases the extension force.

Tap early: Ankle joint loading can progress from pressure to damage quickly. Do not attempt to tough through ankle compression — tap at first joint pressure and reset.

What causes escapes to fail

Escapes fail when the defender waits for acute pain before reacting. The arm wrap can apply extension force before sharp pain registers. The cue to respond is the wrap contact on the ankle — not a pain signal.

Setup and Entry

From ashi garami (POS-LE-ASHI)

With inside space established, the near arm reaches forward to hook under the opponent’s ankle (crook of the elbow at the heel). The far arm comes over to close the wrap. The ashi garami leg hooks maintain the entanglement position while the arms attack the ankle. The finish is initiated by rolling away from the opponent or driving the hips, driving extension force through the arm wrap to the ankle.

From outside ashi garami (POS-LE-OUTSIDE-ASHI)

Outside ashi exposes the ankle from a slightly different angle. The arm wrap entry from outside ashi positions the attacker’s body to the side rather than in front — this changes the direction of the body drive during the finish (more lateral rotation than the direct roll from standard ashi). The wrap mechanics are identical; the body drive direction is adjusted to match the positional geometry.

The Mechanics

The Pato lock applies ankle extension and rotation through a two-arm wrap, using body movement as the force generator:

Arm wrap configuration: Identical to the tren lock — near arm under the heel (elbow crook at the calcaneus), far arm over the top closing the wrap. The heel must be inside the arm wrap at the elbow crook for the extension force to reach the ankle joint rather than the calf.

Body drive: From ashi garami, the finish is typically a roll or a hip drive away from the opponent. The arm wrap is fixed; the body movement creates the extension through the wrap. This is the same mechanism as the tren lock’s body drive, applied from a different positional base.

What differs from the tren lock: The body orientation. In the tren lock, the attacker is behind the opponent; the body drive direction is downward and forward. In the Pato lock, the attacker is in front of and entangled with the opponent; the body drive direction is a roll or hip drive that works with the ashi garami entanglement geometry. The arm wrap and the joint target are identical; the geometry of the drive changes because of the positional origin.

Relationship to the Tren Lock

The Pato lock and the tren lock share the same mechanical target and the same arm wrap configuration. The only difference is the entry path: the tren lock requires the truck position or back control; the Pato lock enters from ashi garami and outside ashi.

This relationship illustrates the site’s core approach. The mechanical truth — ankle in extension, arm wrap as lever, body as fixed point — is position-agnostic. The practitioner who understands the tren lock’s mechanics will recognise the same invariables in the Pato lock immediately. What they must learn is the positional adjustment: the ashi garami base changes the body drive geometry, but the mechanical law being applied is unchanged.

Cross-links: Tren Lock (SUB-ARM-TREN-LOCK) — truck/back control entry to the same ankle wrap. Truck / Crab Ride (POS-LE-TRUCK) — the tren lock’s primary positional base.

Position Requirements

• Ashi Garami / SLX (POS-LE-ASHI) — Primary platform. Inside space established, ankle accessible from the front.
• Outside Ashi Garami (POS-LE-OUTSIDE-ASHI) — Secondary platform. Ankle accessible from the side; body drive direction adjusts accordingly.

Common Errors

Drilling Notes

Ecological approach

Game: attacker starts in ashi garami with inside space established. Task: reach the ankle with the arm wrap. Defender’s task: pull the ankle away or knock the first arm off before the wrap closes. The attacker discovers the timing of the wrap entry through the constraint of the active defence.

Systematic approach

Phase 1 (cooperative): from static ashi garami, practise placing the near arm under the heel without disturbing the leg position. Ten repetitions. Checkpoint: is the calcaneus at the elbow crook? Phase 2 (close the wrap): add the far arm closure. Confirm heel placement. Phase 3 (body drive, slow): add the body drive at 20% force. Identify the correct drive direction for your ashi garami geometry. Phase 4 (live): attacker attempts; defender fights the arm wrap and attempts leg extraction.

Ability level notes for drilling

Advanced: prerequisite is solid ashi garami mechanics and familiarity with ankle lock structures. The Pato lock adds an arm-wrap finishing option to the ashi garami attack set — it is not a beginner technique and requires understanding of both the positional base and the ankle joint loading mechanism.

Ability Level Guidance

Ruleset Context

The Pato lock applies ankle extension through an arm wrap. As an ankle lock variant, it is generally legal in formats that permit straight ankle locks, but the rotational component of the arm wrap may be assessed differently by some rulesets. Verify with competition organisers before competing.

Also Known As

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