Rotherham United played 195 league seasons and cup tournaments in the data, 1920 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).
| 539 | Albacete (Spain) | 5.1 |
| 540 | Santo André (Brazil) | 5.1 |
| 541 | Tigres UANL (MEX) | 5.1 |
| 542 | Rotherham United (England) | 5.0 |
| 543 | Sivasspor (Turkey) | 5.0 |
| 544 | UD Salamanca (Spain) | 5.0 |
| 545 | Inter Baki (Azerbaijan) | 5.0 |