John Danaher took the most valuable position in jiu-jitsu and rebuilt it as a closed problem with a forced solution. The Straight Jacket — seatbelt, hooks or body triangle, and a hand-fighting sequence that strips the neck bare — is the reason the Danaher Death Squad and its successors finish the back at a rate the sport had never seen.
On the first day of the 2019 ADCC World Championship in Anaheim, Gordon Ryan needed one minute and forty-seven seconds to take Ben Hodgkinson's back, thread a strangle under the chin, and finish it. In the quarterfinal he did the same thing to Tim Spriggs — different opponent, same position, rear-naked choke at 7:12. In the semifinal against Lucas "Hulk" Barbosa he could not find the finish, so he settled for climbing onto the back, locking a body triangle, and riding it to a 3–0 decision. In the −99 kg final he took the back of Vinícius "Trator" Ferreira and closed the tournament with a one-arm rear-naked choke at 9:17.
Four matches, one gold medal, and the same position decided every one of them. To a spectator it looked like Ryan simply out-classed the bracket. To anyone who had studied under his coach, it looked like something narrower and more deliberate: a system running exactly as designed. Ryan was not improvising his way to the back and hoping to strangle whoever he found there. He was executing a codified sequence — get to the seatbelt, install the hooks or the body triangle, win the hand fight, remove the defending hands one at a time, and arrive at a neck that has no defenders left.
That system has a name inside its own instructional. John Danaher calls it the Straight Jacket. It is the reason the back — long treated as jiu-jitsu's reward position, the place a match went once it was already won — became, in the hands of Danaher's students, the place matches were ended.
Danaher's contribution was not a new grip or a new choke. It was the claim that back control is a closed problem — that with the right control hierarchy and the right order of operations, the escape can be removed before the strangle is ever attempted, so the finish becomes arithmetic rather than a scramble.
John Danaher is a black belt under Renzo Gracie, promoted at the Renzo Gracie Academy in Manhattan, where for two decades he coached out of the training room that the grappling world came to call the Blue Basement. New Zealand-born, he arrived in New York as a graduate student in philosophy at Columbia University and took up jiu-jitsu partly to pay for his studies by working the academy's front desk. The philosophical training is not incidental to how he coaches. Danaher's entire method rejects the traditional model of jiu-jitsu instruction — a loose collection of individual techniques taught more or less in isolation — in favor of treating a position as a problem to be defined precisely and then solved with a repeatable sequence.
The back-attack system was the second release in his "Enter The System" series for , following the leg-lock instructional that had already reshaped no-gi grappling. was released in 2019 across eight volumes and roughly eight and a half hours of instruction — not a highlight reel of finishes but a stepwise argument, from the mechanics of the seatbelt through the entries to the back, the control hierarchy, the hand-fighting exchange, and only at the very end the strangle itself. The instructional is the codified proof that this is a discrete system and not merely "Danaher's version of back control": it defines the position's constraints, names its sub-problems, and prescribes an order in which they are to be solved.
The container for all of it is the phrase the instructional repeats more than any other — the Straight Jacket. Where a generic back-control lesson teaches you to take the back and choke, Danaher's material teaches you to first put the opponent in a straitjacket: a set of controls that pins the torso and immobilizes the arms so thoroughly that the defender cannot begin the hand fight that keeps most chokes off. The strangle is the last step, and by the time you reach it, it is barely contested.
This was developed inside a specific competitive team. The Danaher Death Squad — Gordon Ryan, Garry Tonon, Nicky Ryan, and the training partners around them — formed in the Blue Basement and became the proving ground where the system was pressure-tested against elite resistance daily. What the instructional codifies is not theory. It is the reverse-engineered record of what was already winning ADCC matches.
Back control in the abstract is defined by two things: chest-to-back connection and a controlling grip. Danaher's system is defined by a great deal more than that, because its entire premise is that loose back control leaks escapes, and a leaking position cannot support a forced finish. The spine of the system is a control hierarchy, a hand-fighting sequence, and a philosophy about the order in which things happen.
The foundation is the seatbelt: one arm over the same-side shoulder, the other under the opposite armpit, the over-hand clasping into the palm of the under-hand. Every back-control lesson in the sport teaches some version of this. What Danaher's system insists on is where the power comes from. It is not in the hands and it is not in a squeeze. It is in the elbows. The under-elbow drives forward and the over-elbow clamps down, and together they arrest the one thing that lets a defender escape the back: rotation of the upper body. A defender who cannot turn his shoulders cannot turn into you, cannot slide down to the mat, and cannot begin peeling the position apart. The seatbelt, held correctly, is a rotational lock on the torso — the "jacket" of the straitjacket.
A second rule follows from the first: the strangle attack always comes from the under-hook side. The under arm is already threaded across the body toward the far shoulder; it is the natural path to the throat. Danaher's material draws a sharp line between the two hands and gives them separate jobs — the strangle hand and the control hand — and much of the system is about never confusing the two, so that the arm doing the choking is never also the arm responsible for holding position.
The seatbelt controls the torso; the legs control the hips and prevent the defender from sliding out the bottom. Danaher's system treats the two standard options — two hooks (the insteps behind the thighs) versus the body triangle (one leg over the lap, locked behind its own knee or foot) — as a hierarchy chosen by circumstance rather than a matter of taste.
Two hooks are the more mobile, more offensive option: they let the attacker adjust, re-hook, and follow a rotating opponent, but they can be stripped by a defender who fights the hooks and looks to escape "over the top." The body triangle is heavier and harder to shed, trading mobility for a near-permanent connection to the hips — but it commits both legs, and against a defender who knows to attack the exposed foot it carries its own risks. The system's answer is not to pick one forever but to understand what each buys and when to switch. Ryan's 2019 semifinal against Barbosa is the textbook case: unable to finish, he used the body triangle specifically as a control tool to bank a decision, not as a finishing platform.
Here is the part that makes the system the system. A defended back position is a hand fight — the choking arm reaches for the neck, and the defender's hands are there to block it. Most practitioners treat this as a battle of attrition: keep grabbing until you get through. Danaher treats it as a solvable sub-problem with a specific goal — reduce the number of defending hands from two, to one, to zero — and a specific tool set to do it: two-on-one wrist controls, trapping the near arm to the defender's own body, pinning it behind the hip, or, when the legs are long enough, using the body triangle to trap an arm against the opponent's own torso. Each of these removes one of the defender's hands from the fight without freeing the strangle hand to do it.
The instructional frames this as the difference between strangling a defended neck and arriving at an undefended one. Once both of the opponent's hands have been dealt with, the throat is simply exposed, and the rear-naked choke that follows is not a contest — it is the last line of an equation whose earlier terms have already been solved. This is why so many of the Squad's finishes look anticlimactic. The dramatic work happened in the hand fight; the choke is the receipt.
Two ideas sit underneath all of it. The first is the strangle-first philosophy: in this system the back exists to deliver one high-percentage finish — the strangle — rather than a menu of joint locks, and the whole apparatus is optimized toward the neck rather than toward, say, the arm. The rear-naked choke needs no gi, no lapel, and no grip the opponent can strip; it works identically in the gi, in no-gi, and in a cage, which is exactly why Danaher builds the position to feed it. (For the finish itself, see the rear-naked choke.)
The second is the "no escape" premise — the claim that a correctly installed Straight Jacket does not have to react to escapes because it has pre-empted them. Rotation is locked by the seatbelt elbows; the hips are locked by the hooks or triangle; the hands are removed by the hand fight. There is, in the ideal, nothing left for the defender to do. This is the system's most ambitious claim and the one its own instructional leans on hardest: the promotional framing that Danaher's athletes "choose the back and then finish at over 80 percent" in submission-only competition is a marketing figure rather than an audited statistic, but the underlying idea — that the position is meant to remove the escape before attempting the finish — is the genuine intellectual core of the method.
The team that built the system no longer exists under the name that made it famous. In 2020 the Danaher Death Squad left the Blue Basement and relocated, spending time in Puerto Rico, and in July 2021 the group split amid what Danaher publicly described as personal and generational conflicts. Danaher formed New Wave Jiu-Jitsu in Austin, Texas, with Gordon Ryan and Garry Tonon; the school was rebranded Kingsway Jiu-Jitsu in April 2025. Several of the younger members — Craig Jones, Nicky Ryan, Nicky Rodriguez, and Ethan Crelinsten — founded B-Team, also in Austin.
The split fractured the team but not the method. The back system had already been codified in the 2019 instructional and disseminated far beyond the original room, and it now belongs to the sport rather than to any one gym. Its fingerprints are on how the entire elite no-gi field approaches the back in 2026: the seatbelt-first entry, the strict separation of strangle and control hands, the body triangle as a default heavy-control option, and above all the treatment of the hand fight as a sequence to be won methodically rather than a scramble to be survived. Athletes who never trained a day under Danaher now teach the two-on-one hand-fight and the strangle-first order of operations as standard curriculum.
What changed after the split is mostly institutional, not technical. The system's ideas are now transmitted through a competing set of gyms and instructionals rather than a single squad — but the framework each of them starts from is the one Back Attacks: Enter The System laid out.
Selecting the bouts that best show the system deciding matches at the highest level. All are drawn from the 2019 and 2022 ADCC World Championships.
The through-line is not that Ryan is talented, though he is. It is that a spectator can predict the position each of these matches will be decided in before it starts, and the prediction keeps being right. That is the signature of a system rather than a highlight.
White belt learns the seatbelt and the two hooks and, above all, learns not to cross the ankles in front of the opponent (a foot-lock invitation). At this stage the goal is simply to hold the back for the length of a round without losing it. Retention before offense.
Blue belt learns the strangle-hand / control-hand distinction — that the two arms have different jobs and must not be confused. The blue belt who internalizes only this one idea already loses the back far less often, because the choking arm stops abandoning position to chase the neck.
Purple belt learns the hand fight as a sequence: two-on-one, trap the arm, remove the first defending hand, then the second. The purple belt stops muscling for the choke and starts subtracting defenders before attempting it.
Brown belt learns the hierarchy — when to keep the hooks and stay mobile, when to install the body triangle and commit to heavy control, and how to switch between them as the opponent changes. The brown belt closes matches from the back because the escape has been pre-empted, not merely chased.
Black belt rebuilds the position from the entries backward. He arrives at a seatbelt that is already a torso lock, wins the hand fight before the opponent knows it has started, and treats the strangle as the inevitable last step. For a black belt inside this system, the back is not where a won match is celebrated; it is where the match is won.
1. Squeezing the seatbelt with the hands. The power is in the elbows, not the grip. A seatbelt held with the hands and arms tires quickly and still lets the torso rotate. Drive the under-elbow forward and clamp the over-elbow down; the hands only connect.
2. Confusing the strangle hand and the control hand. The most common way to lose the back in this system is to send the control hand chasing the neck, freeing the opponent's shoulders to turn. Keep each arm on its assigned job until the hand fight is actually won.
3. Reaching for the choke before the hands are removed. Attacking a fully defended neck is the attrition trap the system is built to avoid. Remove the first defending hand, then the second, then attack. The strangle should be the anticlimax, not the fight.
4. Committing to the body triangle against a long-legged defender who attacks the foot. The body triangle is heavy control, but it exposes a foot and commits both legs. Against an opponent hunting that foot, the two-hook option is safer. The hierarchy exists to be used, not defaulted past.
5. Crossing the feet in front on the finish. A white-belt error that survives into higher belts under fatigue. Crossed ankles in front of the opponent's hips are a straight-ankle-lock invitation. Hooks stay inside the thighs; the body triangle locks behind its own knee.
At open mat this week, isolate the hand fight and nothing else. Start already on your partner's back with a seatbelt and hooks locked. One rule: you are only trying to strip the two defending hands — two-on-one, trap, pin — and your partner is only trying to keep both hands defending the neck. No strangle attempt allowed. A five-minute round, both sides.
You are training the part of the system almost everyone skips. Most people drill the choke; the choke is the easy part. The match is decided in the hand fight, and the hand fight is a skill that only improves when you rehearse it in isolation, without the temptation to lunge for the finish the instant a gap appears.
Add a second round in which you install a body triangle and your partner is allowed to hunt the exposed foot. Learn where the danger is before you need to know it in competition. Then, and only then, add a round where the strangle is live — and notice how little of a fight it is once the hands are already gone.
Repeat weekly for six weeks. The back will stop being a scramble and start being a sequence.
Danaher's back system is a specific, codified method built on top of a universal position. To place it:
The relationship to back control is the same as the closed guard's relationship to the guard: a general position that everyone shares, made into a discrete, teachable weapon by one coach's insistence on defining the problem precisely before solving it.
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