Draft protocol · in design
Every scouting product, every academy platform and every data department claims to see the nineteen-year-old who will become good. It is the most valuable claim in football analytics and the least examined: by the time it can be checked, nobody is checking, and the ones that were wrong are not the ones anybody quotes.
The best young players at the best clubs mostly do become the best players, and a rating that says so has told you what the team sheet already says. So each board scores what a rating adds to who the player already is — and a restatement of current ability scores exactly zero, by construction.
What is measured
A potential claim mixes three different futures — whether he gets a chance, how high he climbs, and whether he is any good once he is there. They resolve differently and they are scored separately, because adding them would need a weighting nobody can defend. A participant enters any of them.
Of two players the same age, at clubs of the same standing, playing about as much as each other — did the one rated higher go on to play more senior minutes at a higher standard? Opportunity is the first thing a potential claim implies, and the bar is what the player already gets, so a rating that only knows who is already in the team adds nothing.
Not open yetWhere is he actually playing three seasons on — which competition, and at a club of what standing? A rating is compared against the level he had already reached when it was made, because a player at a strong club is likelier to stay at one whatever anybody predicted.
Not open yetReaching a level is not succeeding at it. The third board scores the same performance composite the Player Valuation and Scouting boards use, measured at the horizon, against the composite the player was already posting. This is the one that separates a claim about a career from a claim about a transfer.
Not open yetWhat a participant sends
A participant rates the players in an open cohort — an age band, in covered competitions — on its own scale, because the score depends only on order. Each rating is stamped with the date it was submitted and is frozen; it is scored against what happened after that date and never against anything already public when it arrived. A participant may rate a single club’s academy or every player in the cohort, and the share it covered is published beside whatever it scores.
The hard part, stated plainly
This is the slowest board the Arena runs, and pretending otherwise would be the easiest way to get it wrong. Cohorts from seasons already played can be scored immediately, which is how the protocol gets calibrated before anyone enters; a cohort opened today does not resolve for three seasons, and its board says so rather than showing an early number as though it were settled. What is not measured is the counterfactual: nobody can observe the career a player would have had at a different club, under a different coach, without the injury.
A deliberate boundary
One name that came good proves nothing — every scouting department has one, and the misses are not published. What is measured is the ordering over a whole cohort, so a participant is paid for being right about the many rather than lucky about the one. The protocol will be published before any score exists, so that it cannot be shaped to suit one. Read how the Arena scores, or see a board that is already open.