The most complete centre-backs and full-backs aged 21 or under across 4 leagues, auto-discovered live from the league leaderboards (not a hand-picked list) and plotted on the two traits that separate a pure stopper from a modern ball-playing defender: how much defensive work they do, and how much they contribute in possession. Full rankings continue on page two.
X-axis: defensive actions per 90 (combined tackles + interceptions + clearances + blocks metric). Y-axis: accurate passes per 90. Dashed lines mark the field median on each axis — the four resulting zones are labelled by what that combination usually means for a recruiter. Hover any point for exact figures.
Sorted by defensive actions per 90. Quadrant assignment uses the same field-median thresholds as the map on page one, so it reads directly off that chart.
| # | Player | Club | League | Defensive Actions P90 | Accurate Passes P90 | Quadrant |
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