1.FC Union Berlin played 49 league seasons and cup tournaments in the data, 1953 to 2026. 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).
| 516 | RB Bragantino (Brazil) | 5.4 |
| 517 | FC København (DEN) | 5.4 |
| 518 | Millonarios (COL) | 5.4 |
| 519 | 1.FC Union Berlin (Germany) | 5.4 |
| 520 | Paulistano (Brazil) | 5.4 |
| 521 | Ascoli (Italy) | 5.4 |
| 522 | Brasil de Pelotas (Brazil) | 5.4 |