Fortuna Sittard played 81 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).
| 524 | Leyton Orient (England) | 5.4 |
| 525 | Portimonense SC (Portugal) | 5.3 |
| 526 | Arbroath (Scotland) | 5.3 |
| 527 | Fortuna Sittard (Netherlands) | 5.3 |
| 528 | Amiens SC (France) | 5.3 |
| 529 | Kocaelispor (Turkey) | 5.3 |
| 530 | BSC Young Boys (Switzerland) | 5.3 |