For most of the sport's history the heel hook was the technique you were told never to touch — banned in the gi, whispered about in the corner of the room, feared for what it did to knees. Then a small group of grapplers in New York turned it into the most systematic finishing method in jiu-jitsu, and the rulebooks began to move. This is how the most dangerous submission in the sport became its most studied.
On 15 August 2015, in a converted theater in Los Angeles, Eddie Cummings walked through the 145-pound bracket of the Eddie Bravo Invitational and did not attempt a single choke, armbar, or points-based control. He finished every opponent the same way: he attacked a leg, isolated the foot, and rotated the heel until the man tapped or his knee failed. Kevin Berbrich, Russ Miura, and Baret Yoshida — the last a decorated veteran with two decades on the mat — all went out the same door. Cummings took the grand prize and, per the event's submission bonuses, a check for each finish inside regulation.
To most of the grappling audience watching that night, this looked like a stunt. Heel hooks were the technique your coach forbade. They were banned in every gi tournament that mattered. They had a reputation as a dirty, uncontrollable move that blew out knees in the training room and belonged to sambo players and cage fighters, not to jiu-jitsu. A man winning a whole bracket with nothing else was not supposed to be possible, and it was certainly not supposed to be repeatable.
It was both. Cummings was not lucky and he was not reckless. He was the visible edge of a training-room project run out of the Renzo Gracie Academy in Manhattan by a New Zealand-born coach named John Danaher, and within three years that project would produce the most dominant no-gi competitor the sport had seen. The technique the rulebooks called too dangerous to allow turned out to be the most systematizable submission in jiu-jitsu — the one that most rewarded study, sequencing, and control.
This is not a story about a dangerous move. It is a story about what happened when the sport finally decided to study the thing it had been afraid of.
The heel hook is the only major submission in jiu-jitsu that the sport spent decades banning and then, having watched it studied properly, decided the danger was in the ignorance — not the technique.
To understand why the heel hook arrived in jiu-jitsu so late, you have to understand that it did not come from jiu-jitsu at all.
Leg locks are old. Rotational and straight attacks on the ankle and knee appear in catch-as-catch-can wrestling, the professional hooking style that spread through Britain, America, and beyond in the late nineteenth and early twentieth centuries, and they are foundational to sambo, the Soviet grappling art codified in the 1920s and 30s, whose competitive ruleset treated leg attacks as a primary offensive category rather than a taboo. In both traditions the leg was a legitimate target from the start. A catch wrestler or a sambist grew up attacking knees the way a Gracie-lineage jiu-jitsu player grew up attacking the neck.
The heel hook belongs to no one, but the way a smaller no-gi grappler gets to it — off a knee shield, from underneath a standing passer, patient and calm — was codified by one Australian more clearly than by anyone. This is the entry architecture and control-first philosophy that carried Craig Jones to two ADCC finals and into a million hobbyists' games.
John Danaher did not invent the heel hook. He did something the sport had never managed before him: he turned it into a position rather than a lunge. The ashi-garami control hierarchy — from 50/50 out to the saddle and inside sankaku — made the most feared submission in grappling into a high-percentage, controllable finish, and rewrote how the entire no-gi world attacks the legs.
Brazilian jiu-jitsu inherited a different bias. The Gracie system that formed in Rio through the 1930s and 40s was built around positional dominance — pass, mount, take the back, choke — and it treated the legs largely as tools for control and sweeping rather than as targets. Straight ankle locks (the reta, or straight footlock) were always present, and a lineage of Brazilian competitors, the Machado family among them, kept a foot-lock tradition alive. But the heel hook specifically, and the leg entanglements that make it safe to hunt, sat outside the mainstream curriculum. Worse, they were actively coded as bad manners: a technique for people who could not pass your guard and resorted to cranking a knee instead.
The rules enforced the bias. Because the heel hook attacks through rotation rather than through pain, and because the knee gives little warning before it fails, the technique earned a genuine and deserved reputation for injuring training partners who did not know when to tap. Sport federations responded by banning it. The IBJJF — the sport's largest tournament body — prohibited heel hooks across every division and, just as importantly, banned knee reaping (the leg position, "reaping," in which the attacker's leg crosses the outside of the opponent's thigh and threatens the knee), which had the effect of outlawing the very entanglements from which heel hooks are safely applied. In the gi, at every belt, the technique was simply gone.
The revival came from the no-gi, submission-only world, and specifically from John Danaher and a cluster of his students at Renzo Gracie's academy in New York, a group that grappling media came to call the Danaher Death Squad. Beginning around 2015 and cresting through 2017, Danaher's students — Eddie Cummings first, then Garry Tonon, then a young Gordon Ryan — began finishing world-class opponents with heel hooks at a rate that could not be explained as ambush or novelty. What Danaher had done was treat the leg lock the way earlier coaches had treated the back attack: as a system, with named entries, a hierarchy of controls, defensive priorities, and a chain of transitions between entanglements. The heel hook stopped being a trick you caught and became a position you built.
The proving ground was submission-only competition, above all the Eddie Bravo Invitational (EBI), a no-time-limit, submission-only event that rewarded finishing over positional points and gave the leg-lock game a stage. Cummings' run at EBI 4 in August 2015 and Tonon's welterweight title at EBI 3 earlier that same year are the moments the modern era usually dates itself from.
Then the rules began to move. The ADCC submission-grappling world championship — the sport's premier no-gi event — had long permitted heel hooks at its championship level, and as the leg-lock generation matured, ADCC became the arena where a complete leg game was not just legal but expected. Finally the gatekeeper itself moved: the IBJJF announced that, for adult brown and black belts competing in no-gi, both inside and outside heel hooks and the reaping positions that feed them would be legal from 2021. The gi rules, and the rules for lower belts and for the Master (age-group) divisions, did not change. But the symbolic wall had come down. The technique the sport's largest federation had banned for its entire existence was now, at its upper belts and in its no-gi ruleset, a sanctioned way to win.
The single most important sentence a beginner can learn about the heel hook is this: it is not an ankle lock. It is a knee attack that happens to be applied through the heel.
This is the fact that makes the technique dangerous, and it is the fact that most people who fear it do not understand. A straight ankle lock (the reta) hyperextends the ankle joint — it hurts early, it hurts a lot, and the pain gives the defender clear, escalating warning to tap well before anything tears. The heel hook does something categorically different. By trapping the heel and rotating the foot, the attacker converts the foot into a long lever and transmits rotational, twisting force up the shin and into the knee. The knee is a hinge, not a swivel; it tolerates almost no rotation. The structures that fail are the ligaments and the meniscus — the ACL, the MCL and LCL, the joint capsule. Critically, this damage can occur with comparatively little pain, and it can occur fast, sometimes faster than the defender can process what is happening. There is often no gradual warning, no "this is getting uncomfortable" window. There is a position that is fine, and then there is a knee that is not.
Two consequences follow, and they define how the technique is trained everywhere it is trained responsibly.
First: you tap early, and you tap to position, not to pain. In a heel-hook culture, the correct response is to tap the moment the attacker secures the controls and begins to rotate — not to wait for a signal of injury, because the signal of injury may be the injury. This is the reverse of how beginners are taught to survive an armbar or a choke, and it is the single hardest habit for a leg-lock novice to build.
Second: because the finish is rotational rather than pain-driven, the entire game lives in the control, not the twist. The heel hook itself — the final rotation of the heel — takes a fraction of a second and almost no strength. Everything that makes the technique high-percentage or low-percentage happens before that: in how completely you have trapped the leg, immobilized the hip, and isolated the heel. This is why the leg lock rewarded systematization so richly. The finish is trivial. The position is everything.
There are two heel hooks, and the distinction governs which controls you use, which the rulebooks treat differently, and how dangerous each is considered.
The outside heel hook attacks the heel of a leg that is on the outside of your control — the classic version reached from a standard ashi-garami or single-leg-X entanglement, rotating the heel away from the midline and toward the little-toe side. It is the more accessible of the two and the one most beginners meet first.
The inside heel hook attacks the heel from the inside — the attacker's rotation drives the heel toward the big-toe side and the opponent's own centerline — and it is reached from the inside-leg entanglements. It is widely regarded as the more powerful and more dangerous of the two, because the line of the rotation feeds even more directly into the knee's weakest plane and because the controlling entanglement (the "saddle," below) is extraordinarily difficult to escape. When the IBJJF legalized heel hooks for no-gi upper belts, it explicitly sanctioned both inside and outside variations, along with the twisting knee attacks and the reaping positions generally — a recognition that the inside game could not be separated from the outside one and still make sense.
You cannot hunt a heel hook from open space. The submission is only as safe and only as available as the leg entanglement — the family of positions grapplers call ashi-garami ("leg entanglement") — that holds the opponent's leg and hip still while you work. Learning the heel hook is really learning these controls, roughly in ascending order of power.
Two further points complete the mechanical picture. The heel hook does not exist in isolation from the sport's other leg attacks: it lives in the same entanglements as the straight ankle lock, the kneebar, and the toe hold (see Toe Hold), and a competent leg-locker threatens all of them from the same controls, using the defense of one to open another — exactly the way a guard player chains a choke into an armbar. And the K-guard, a modern open-guard configuration, became one of the most popular gateways into these entanglements, a way to get underneath a standing passer and enter the ashi family in one motion (see K-Guard).
The reason the heel hook rewarded systematization more than almost any other submission is now visible. Its finish is fast and low-effort, so the skill is not in the finish. Its safety and its percentage depend entirely on the completeness of an entanglement, and entanglements form a hierarchy you can climb. And its danger is rotational and quiet, which means the difference between a training-room injury and a clean tap is knowledge — of when you are caught, and of when to tap. A technique like that does not reward the bold. It rewards the studious.
By 2026, the leg lock is no longer a specialty. It is a required part of a complete no-gi game, and the debate that consumed the sport a decade ago — is this a legitimate technique or a cheap trick — is settled.
The clearest marker of the shift is the IBJJF's own rulebook. When the federation legalized heel hooks and reaping for adult brown and black belts in no-gi from 2021, it did more than change what was allowed; it changed what the sport's largest competitive pipeline had to teach. A brown belt preparing for the IBJJF No-Gi Worlds now has to defend inside sankaku and the saddle the way an earlier generation had to defend the back. The technique moved from the fringe to the curriculum.
At the elite level, ADCC has become the arena where complete leg games are on display, and the athlete most associated with the era is Gordon Ryan, the Danaher student who grew up inside the system Cummings and Tonon pioneered and became the most dominant no-gi competitor of his generation (see Gordon Ryan). Ryan's game is not a leg-lock game in the narrow sense — his back attacks and passing are as feared as his entanglements — but the leg lock is fully integrated into it, threatened and defended as fluidly as any other position. That integration is the point. The modern leg-locker does not "go for legs." He treats the legs as one more region of the body to be attacked within a single connected system.
The most important change since 2015, though, is cultural rather than technical: the sport learned to train the heel hook safely. The early fear was not irrational — heel hooks did hurt people, precisely because nobody understood the tap-early, tap-to-position discipline the technique demands. What the systematizers exported alongside the entries and controls was a training culture: rotate slowly, tap immediately, treat the entanglement as the win and the twist as a formality. Gyms that adopted that culture found that the injury rate fell even as the technique became central. The danger, it turned out, had lived mostly in the ignorance.
A note of proportion belongs here. The gi has not changed. Heel hooks and reaping remain illegal in every IBJJF gi division at every belt, and in the age-group Master divisions even in no-gi. For a large share of the sport's practitioners — everyone who competes primarily in the gi, everyone below brown belt, everyone in the Masters brackets — the heel hook is still a technique to understand and defend rather than to compete with. The revolution is real, but it is a no-gi, upper-belt revolution, and the older bias survives wherever the older ruleset does.
A short selection of documented moments that mark the technique's arrival. Precise scores and finishing times below should be verified against event records before publication; see Known open items.
White belt learns one thing about the heel hook and only one thing: how to recognize the entanglements and when to tap. At this level, in most gyms and under most rulesets, the beginner will not be applying heel hooks at all. The entire lesson is defensive and it is about safety — feel the leg get trapped, feel the hip fold, tap before the rotation, never wait for pain.
Blue belt learns the straight ankle lock and the basic ashi-garami control, building the entry habits and the hip discipline that the heel hook will later require — often without heel-hooking at all, because the ruleset the blue belt competes under still forbids it.
Purple belt starts to build the entanglement hierarchy: single-leg-X to ashi to the saddle, the transitions between them, and the defensive priorities (hide the heel, clear the knee line, recover the hip). The purple belt is learning the position, not the finish.
Brown belt is, under the modern IBJJF no-gi rules, the first belt permitted to compete with the heel hook — and so it is the belt at which the study becomes competitive rather than theoretical. The brown belt learns to hunt the inside heel hook from the saddle and to defend it from the wrong side of 50-50.
Black belt integrates the leg lock into a whole-body attacking game, threatening the heel hook to open a pass, defending it to enter one, and treating the entanglements as fluidly as the guard. The black belt's leg game is not a specialty bolted onto the rest; it is continuous with it.
1. Racing to the finish instead of building the control. The heel-hook finish is fast and easy; that is exactly why beginners over-value it. They grab the heel and crank before the entanglement is complete, the opponent spins free, and they lose the leg. The rotation is the last thing you do and the least important. The win is the entanglement.
2. Attacking the ankle when you mean to attack the knee. Newcomers treat the heel hook like a straight footlock — squeezing the foot, expecting pain to do the work. It doesn't. The finish is rotational, from the heel into the knee, and if you are not controlling the heel and blocking the knee's rotation you do not have a heel hook. You have a foot in your hands.
3. Not knowing when you are caught — and not tapping. The most dangerous error is defensive, not offensive. Because the heel hook gives little pain warning, the untrained defender waits for a signal that never comes until the knee is already gone. Learn the positions from the losing side. Tap to the position — the completed entanglement plus the beginning of rotation — not to pain.
4. Exposing the heel while defending. A huge share of heel-hook finishes come not from the attacker's entry but from the defender feeding his own heel by turning the wrong way, straightening the trapped leg, or scrambling without hiding the foot. Good leg defense is largely about controlling where your own heel is.
5. Ignoring the ruleset you actually compete under. A gi competitor, a Masters competitor, or anyone below brown belt in the IBJJF will be disqualified for a heel hook. Building a competitive game around a technique your division forbids is a planning error, not a technical one. Know which of your tournaments allow it before you make it your A-game.
At open mat this week, do not drill the finish. Drill the entanglement and the tap.
Start with a positional round from single-leg-X: the bottom player's only goal is to transition from SLX into a completed ashi-garami and secure the trapped leg; the top player's only goal is to clear the knee line and pull the leg free. No heel-hook rotation at all — the round ends when the entanglement is secured or the leg escapes. Fifteen minutes, switching who starts underneath. You are training the position that is the entire game.
Then, with a trusted partner of similar rank and only under a coach's eye, add the finish at a crawl: the attacker secures the inside or outside heel hook and applies rotation slowly and continuously, and the defender's job is to tap at the first moment of rotation, every time, before there is any discomfort. This drill trains the two habits that matter more than any entry: rotate slow, and tap early. If your gym does not train heel hooks live, keep the whole session in the entry-and-position phase — that work transfers, and it is safe.
The heel hook is the finishing edge of an entire connected system of leg entanglements, and it links outward to the positions that feed and share it.
Every one of these connects to the same truth: in the modern no-gi game the legs are not a separate specialty but a region of one continuous attacking network, and the heel hook is what sits at the sharp end of it.
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Known open items on this draft:
The Melbourne physiotherapist who heel-hooked three of the heaviest men at ADCC 2019 did not build his leg game the way New York did. Lachlan Giles's system is the analytical, anatomy-first branch of the modern entanglement game — codified in "The Leg Lock Anthology" and taught to a generation, including Craig Jones.