Breakdown Tactics in Rugby: The Ruck and Jackal Explained

The breakdown is the contest for the ball in the moments right after a tackle. It happens more often than any other phase of rugby — several times a minute — and it produces more penalties than anything else on the field.

It is also the part of the game that confuses new viewers most. Bodies pile in, the referee’s arm shoots out, and it is rarely obvious why one side has been penalised and the other has not.

This guide explains what is actually happening at the breakdown, what the referee is looking for in the split second it lasts, and how the laws changed for the 2026 Super Rugby Pacific season — including which changes are genuinely new and which have simply been misreported.

What the breakdown actually is

“Breakdown” is not a term in the law book. It is the everyday word for everything that happens between a tackle being completed and the ball being played away again. In practice it almost always contains two distinct events: a tackle, and then a ruck.

The tackle

A tackle is complete when the ball carrier is held and brought to ground. At that instant a strict sequence of obligations kicks in. The tackler must release the ball carrier immediately and can only compete for the ball again after getting back to their feet. The tackled player, now on the ground, must release or make the ball available straight away — they cannot hold on, crawl or place it under their own body.

Those release duties exist so that the arriving players are contesting a free ball, not wrestling it out of someone who is refusing to let go. Most tackle penalties are simply one of those duties not being met quickly enough.

The ruck

A ruck forms the moment at least one player from each team is on their feet and in contact over the ball while it is on the ground. That threshold matters more than it sounds. Before a ruck exists, a defender is allowed to use their hands to grab and win the ball. The instant a ruck forms, hands become illegal for everyone, and the ball can only be played with the feet — or picked up once it has clearly emerged. The full wording is set out in World Rugby’s Law 15: Ruck. The whole contest is frequently decided in under two seconds.

The gate: rugby’s most misunderstood rule

Any player joining a ruck must enter from behind the hindmost foot of the last team-mate already in it. That imaginary entry point, running square across the field, is called the gate.

You cannot come in from the side. You cannot come in from the opposition’s side. You come in through your own gate, facing forward and square to the contest. This is the single most common breakdown penalty in the professional game, and it exists for a plain safety reason: a player arriving from the side comes in unseen and unbraced, which is exactly how neck, shoulder and head contacts happen.

The gate is tied directly to the offside line at the ruck, a relationship our guide to offside rules in rugby union unpacks in more detail.

The jackal: winning the ball on your feet

The jackal is a defender who stays on their feet over the ball immediately after a tackle and tries to win it before a ruck can form. The name is borrowed from the animal that arrives over a kill and takes it. It is usually the job of an openside flanker — the number 7 — but any player quick and strong enough can do it.

For a jackal to be legal, three things must all be true at once:

• They must be on their feet. Not kneeling, not leaning their weight on the tackled player, not propped up with a hand on the ground. They have to support their own body weight the entire time.
• They must have arrived through the gate. Coming over the ball from the side is a penalty no matter how clean the technique looks.
• If they made the tackle, they must have released first. A tackler who goes straight from making the tackle to grabbing the ball has never released. They must let go, stand up, and only then compete.

The window is tiny. As soon as an attacker binds onto the jackal, a ruck exists and the jackal must let go of the ball at once or concede a penalty. That is what makes it a high-risk act: win it and you earn a turnover or a penalty in strong field position; lose it and you have committed a defender and left the line one short for the next phase. Knowing which number is likely to be over the ball is easier once you understand how the roles fit together in our guide to rugby positions.

Why the crocodile roll is no longer legal

For years the standard way to remove a jackal was the crocodile roll: wrapping the defender around the torso and using body rotation to twist them off the ball and onto the ground.

World Rugby outlawed it. The ban arrived with the law amendments effective from 1 July 2024 and remains in force. As World Rugby set out when it confirmed the fan-focused law changes, the roll was removed on player-welfare grounds: twisting a player whose lower body is planted and loaded over the ball had been linked to serious leg and lower-limb injuries. The action is now penalised.

Any article, video or coaching resource still teaching the crocodile roll as a technique to master is out of date, and anything instructing players to target the neck or twist through a joint should be treated as unreliable. The legal alternatives are straightforward:

• Get there first. The most reliable answer to a jackal is simply arriving before they are set and balanced over the ball.
• Clear out low and through. Bind with the whole arm, get underneath the chest, and drive the player back past the ball using the legs — a bind, never a shove or a shoulder charge.
• Counter-ruck as a unit. Two or three players driving together, on their feet, past the ball can win the whole contest outright.

Attacking the breakdown: securing quick ball

For the team in possession, the breakdown is about speed far more than contest. Quick ball means the ball is available again before the defence has reset, and that is where line breaks come from. Coaches talk about ruck speed in seconds: ball available in under about three seconds is considered quick, while anything beyond five gives the defence time to organise fully and set its line.

The roles around the ball are usually drilled like this:

• The ball carrier works to fall so the ball finishes as far from the opposition as possible, arms extended back toward their own side to present it cleanly.
• The first arriving support player deals with the immediate threat: if a jackal is over the ball, they clear them out; if nobody is there, they stay on their feet and stay available.
• The second arriving player either binds on to make the position immovable or peels off to become a passing option for the next phase.

The real judgement is how many players to commit. Every forward buried in a ruck is one fewer standing in the attacking line, so well-drilled teams commit the minimum needed to make the ball safe and keep the rest on their feet as options.

Defending the breakdown: contest or fold?

Defences face the mirror-image decision, and it is one of the genuine tactical choices in the modern game.

• Contest. Commit a player or two to the jackal or a counter-ruck. This can win turnovers and penalties, but it risks conceding a penalty and it thins the defensive line if the contest fails.
• Fold. Ignore the ruck entirely and get everyone into the defensive line, sprinting from the short side around to the open side to fill the numbers.

Most professional sides do both, selectively — they pick their moments, such as an isolated carrier or a slow support runner, and fold the rest of the time. How those lines are built and rushed is the subject of our guide to defensive systems in modern rugby.

There is also the choke tackle, where defenders hold the ball carrier upright instead of putting them to ground. If the ball is trapped off the deck it becomes a maul rather than a breakdown, and a maul that is held up and stops earns a scrum to the defending side — turning a tackle into a change of possession without ever contesting a ruck.

The 2026 Super Rugby Pacific law changes

This is where a lot of coverage gets it wrong, so it is worth being precise. The five-second rule is not new. When a referee judges the ball has been won and is available, they call “use it”, and the team has five seconds to play it away or concede possession. That is Law 15.17 in the standard World Rugby law book and it applies everywhere, from Test rugby to club grounds.

What changed for 2026 was a separate set of Super Rugby Pacific competition innovations. These are trialled variations for that competition only. They are not global law, so they do not automatically apply in Test rugby, the NPC or club rugby. Super Rugby Pacific set them out in its official confirmation of the 2026 innovations, and RugbyPass gathered the full list of the five changes. They also sit alongside the wider law reform that has lifted ball-in-play time and quickened the breakdown across the game, a trend law firm Brabners analysed in the context of the 2026 season.

The change with the biggest effect on the breakdown is the no-late-joining rule. It targets the caterpillar ruck — the tactic where attacking forwards bind in a long line behind the ball, buying the halfback time and space to set up a box kick. Under the 2026 rule, once “use it” is called nobody else may join, so the caterpillar cannot be extended, the halfback has less protection and must move faster. Analysts, including RugbyPass in its look at the innovations’ likely on-field impact, expected more charged-down kicks as a result. The individual law numbers behind each tweak are set out clearly by Rugby Referee and analysed in depth by the 89 Rugby law-variations breakdown. You can follow how the trial plays out through our Super Rugby Pacific hub.

The halfback and the tempo of the ruck

The halfback, or scrum-half, is the player who decides when the ball actually leaves the ruck, which makes them the tempo-setter for the whole team. At each breakdown their job is to read which side has fewer defenders, decide whether to pass wide, kick or run themselves, and get the ball moving before the referee’s five-second clock expires.

A halfback who occasionally snipes — picking the ball up and running from the base of the ruck — stops defenders drifting away early, because someone always has to respect that threat. Take the snipe away and the fringe defence can start folding to the wide channels the instant the ball is won, which is precisely why the 2026 no-join rule squeezes the attacking side: less protection at the base forces quicker, riskier decisions.

Why the breakdown decides matches

The logic is a short chain. Slow ball lets a defence set. A set defence forces a kick. A kick usually hands over possession. Quick ball does the opposite: defenders are still turning and realigning, gaps open, and the attack builds momentum phase by phase.

That is why sides invest so much coaching time in this one area, and why breakdown penalties are so expensive — a single ruck penalty can hand over both possession and thirty or forty metres of field position in one whistle. Because the same offence often carries a card or even a penalty try, it is worth knowing how the yellow and red card rules work too.

New to the sport more broadly? Start with our introduction to how to play rugby, or read about the other great set-piece contest for possession in our guide to the scrum.

Frequently asked questions

How is a ruck formed?

A ruck exists as soon as at least one player from each team is on their feet and in contact over the ball while the ball is on the ground. From that moment nobody may use their hands to play the ball, and players may only join through the gate.

What is a jackal in rugby?

A jackal is a defender who stays on their feet over the ball straight after a tackle and tries to win possession before a ruck forms. To be legal they must have entered through the gate, must support their own body weight, and — if they made the tackle — must have released and stood up first.

Is the crocodile roll still allowed?

No. World Rugby outlawed the crocodile roll in the law changes effective from 1 July 2024, on player-welfare grounds after it was linked to serious leg injuries, and it remains a penalty. Clearing out must be a legal bind and drive instead.

What does “through the gate” mean?

Players joining a ruck must enter from directly behind the hindmost foot of the last team-mate already in it, facing forward. Coming in from the side or the opposition’s side is a penalty, whatever the technique.

What is the five-second rule at the ruck?

Once the referee calls “use it”, the team in possession has five seconds to play the ball away from the ruck. This is standard World Rugby law (Law 15.17), not a recent invention; the usual sanction for failing is a scrum, though Super Rugby Pacific’s 2026 trial changes it to a free kick.

What is a caterpillar ruck and why was it targeted for 2026?

A caterpillar ruck is a long line of attacking forwards bound behind the ball, used to shield the halfback while a box kick is set up. Super Rugby Pacific’s 2026 rule preventing any player joining after “use it” is aimed at shrinking it, forcing quicker ball and inviting more charge-downs.