União de Leiria played 74 league seasons and cup tournaments in the data, 1969 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).
| 596 | Al-Ain (UAE) | 4.2 |
| 597 | Siderúrgica (Brazil) | 4.2 |
| 598 | Reggina (Italy) | 4.2 |
| 599 | União de Leiria (Portugal) | 4.1 |
| 600 | FC Schweinfurt 05 (Germany) | 4.1 |
| 601 | SC Olhanense (Portugal) | 4.1 |
| 602 | Chapecoense (Brazil) | 4.1 |