US Boulogne-sur-mer CO played 25 league seasons and cup tournaments in the data, 2001 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).
| 1168 | Stade Brest(L) (France) | 1.1 |
| 1169 | San MartÃn de San Juan (Argentina) | 1.1 |
| 1170 | Bo'ness (Scotland) | 1.1 |
| 1171 | US Boulogne-sur-mer CO (France) | 1.1 |
| 1172 | AFC (Netherlands) | 1.1 |
| 1173 | O Elvas CAD (Portugal) | 1.1 |
| 1174 | Daugava Riga (LAT) | 1.1 |
More: all clubs of France · the world top 200