Club Atlético Unión
Unión played 85 league seasons and cup tournaments in the data, 1967 to 2025. Success weighs every finish by how hard that competition was to win; Efficiency is the share of what the club could have won that it did win; Edge compares that with an average participant (×1.00).
| 285 | Ponte Preta (Brazil) | 13.3 |
| 286 | FK Pirmasens (Germany) | 13.2 |
| 287 | Arsenal de Sarandí (Argentina) | 13.0 |
| 288 | Unión (Argentina) | 13.0 |
| 289 | Millwall (England) | 13.0 |
| 290 | Goiás (Brazil) | 12.8 |
| 291 | Sport Recife (Brazil) | 12.8 |