| Abbreviation | Definition |
|---|---|
| RHSC | Rush Henrietta Soccer Club |
| RISA | Rhode Island Soccer Association |
| RMD | Real Madrid |
| RPSL | Rohnert Park Soccer League |
| RRSA | Round Rock Soccer Association |
| RSCL | Royal Standard Club de Liège |
| RSCL | Royal Standard Club de Liège - One of the most successful soccer clubs in Belgium. |
| RSHL | Real Soccer Haxball League |
| RSL | Rugby Soccer League |
| RSRA | Rappahannock Soccer Referee Association |
| RSRA | Regina Soccer Referees Association |
| RSRA | Rochester Soccer Referee Association |
| RSSA | Rock Springs Soccer Association |
| RSSSF | Rec.Sport.Soccer Statistics Foundation |
| RTSA | Rockaway Township Soccer Association |
| RUSC | Rockland United Soccer Club |
| RVSL | Rockaway Valley Soccer League |
| RYS | Raynham Youth Soccer |
| RYS | Rochester Youth Soccer |
| SAAC | Soccer Academy Association of Canada |