Which leagues field the youngest players?
Average age of the players who actually appeared, season by season. A young league is usually a selling one.
CONMEBOL Libertadores (International) is the youngest of the lot: 28.67 years on average.
| League | Average age | Player-seasons |
|---|---|---|
| 1. CONMEBOL Libertadores International | 28.67 | 92,200 |
| 2. Super League China | 28.32 | 39,800 |
| 3. J1 League Japan | 28.26 | 50,800 |
| 4. Pro League Saudi Arabia | 28 | 32,200 |
| 5. CONMEBOL Sudamericana International | 27.96 | 104,500 |
| 6. Super League 1 Greece | 27.94 | 24,800 |
| 7. Serie A Brazil | 27.92 | 56,500 |
| 8. K League 1 South Korea | 27.9 | 31,700 |
| 9. CONCACAF Champions League International | 27.28 | 31,700 |
| 10. Liga I Romania | 27.2 | 17,800 |
| 11. Liga Profesional Argentina Argentina | 27.18 | 80,500 |
| 12. World Cup International | 26.96 | 6,900 |
| 13. Süper Lig Türkiye | 26.95 | 36,300 |
| 14. UEFA Champions League International | 26.93 | 56,600 |
| 15. Ekstraklasa Poland | 26.7 | 36,800 |
| 16. Liga MX Mexico | 26.7 | 38,400 |
| 17. Super Liga Serbia | 26.68 | 25,300 |
| 18. La Liga Spain | 26.49 | 39,600 |
| 19. UEFA Europa Conference League International | 26.49 | 99,600 |
| 20. Segunda División Spain | 26.46 | 39,800 |
Showing the major competitions. Include every competition
Age is taken from the year of birth against the season played, not from the profile — that carries the age today, which for an old season would be a decade out. Only players with an appearance count.