Where do scores come from?

Most goals don't start at a stoppage. And the single biggest predictor of whether a possession scores is how long you can keep it alive.

New to r-values, p-values and confidence intervals? Stats made simple for coaches explains every number in this piece in plain English — no propellor hat required.

Ask a room of coaches where scores come from and you'll get a fair fight. Half will say stoppages — win the clearance, win the game. The other half will say turnovers — footy is a transition sport now. Almost nobody says "it depends how long we hold the ball."

We took every scoring chain in our captured AFL data and traced it back to where it began and how long it lasted. Two clear answers fell out — one about where scores start, and a bigger one about patience.

Where scores start: turnover beats stoppage

Sort every scoring chain by how it began — a stoppage clearance, an intercept (winning the ball back in open play), or a kick-in — and the split is decisive.

More than half of all scores come from a turnover — winning the ball back in open play. Stoppage clearances account for about four in ten. Kick-ins, for all the structure teams pour into them, produce almost nothing: 3% of scores.

Here's the subtlety, though. An intercept chain and a clearance chain convert at the same rate — about one in five of each ends in a score. Turnovers don't dominate because each one is more dangerous; they dominate because there are simply more of them. The ball changes hands in open play far more often than it goes to a stoppage. So the scoreboard engine isn't a magic transition dividend — it's volume. Win the ball back more often and you get more cracks, each one as good as a clearance.

That reframes the stoppage obsession. Stoppage ball is good ball — it converts as well as anything — but it's a minority of your scoring opportunities. The bulk of your scoreboard is decided by how often, and how well, you win the ball back when it's live.

The bigger finding: patience pays, steeply

Now the number that should change how you think about ball use. Group every chain by how long the team held the ball and look at how often each ends in a score.

A possession that survives 30 seconds or more converts to a score nearly half the time (49%). A possession that ends inside 8 seconds scores less than one time in ten (8%). That's a six-fold difference, and it climbs cleanly the whole way up.

This holds for both kinds of ball. Long intercept chains convert at 50%; long stoppage chains convert at 62%. Quick ones — under 8 seconds — barely scrape 7–9% either way. Whether you win it at a bounce or off a turnover, the chains that score are the ones you manage to keep alive.

A long chain is, almost by definition, a chain that's gone right: clean hands, runners hitting targets, the ball progressing instead of being coughed up. That's the intuition coaches have always had about a "worked" possession — and the data backs it hard. The fast chains that die early are the panicked ones: the bomb to a contest, the blind handball, the kick across goal that's cut off.

One honest caveat: some of this is circular. A chain that's about to score keeps going because it's working — duration is partly a symptom of success, not only a cause of it. But the size of the gap, and the fact that quick chains so rarely score, carry a real coaching message: the chains that die fast almost never hurt the opposition, and most fast deaths are self-inflicted.

What this means for your team

• Stop treating the clearance as the scoreboard. Most of your scoring starts with a turnover in open play. Your scoreboard is built more on how often you win the ball back than on first hands at the stoppage.
• Win it back more, not just better. Intercept ball is no more dangerous per chain than stoppage ball — there's just more of it available. The teams that score most are the ones generating the most turnovers, not the ones with a secret transition formula.
• Value retention over risk. The single biggest swing in scoring probability is keeping the ball alive. A possession you hold for 30 seconds is a coin-flip to score; one you give up in five is almost dead. Reward the extra handball that keeps the chain breathing over the hopeful long bomb that ends it.
• Audit your quick turnovers. The chains dying inside 8 seconds are where your scoreboard leaks. They almost never score — and every one you turn over hands the opposition the most common scoring start there is.
• Don't over-invest in kick-in trickery for offence. Kick-ins produce a tiny share of scores. Their value is in not conceding from them, not in launching them.

In short

• Most scores come from turnovers, not stoppages — winning the ball back in open play produces more than half of all scores. Stoppages convert just as well but happen less often.
• The longer you hold the ball, the more you score — from under 10% for a chain that dies inside 8 seconds, to nearly 50% for one that survives 30+. Patience and retention, not speed, separate scoring chains from wasted ones.
• Kick-ins barely score. Defend them; don't build your offence around them.

The fact that source matters — aggregate score share looks the same across two very different stats — is one face of a broader pattern explored in the series' closing piece: Correlation is not causation.

A note on the data

This pools every scoring chain and every possession chain across captured local-league AFL games, after filtering out demo data, unfinished matches and drawn quarters. "Source" is read from the event that started each chain (stoppage clearance, open-play intercept, or kick-in). "Chain duration" is the time the team held the ball, with stoppages in play removed. Conversion is the share of chains in each group that ended in a goal or behind.