| Abbreviation | Definition |
|---|---|
| SYB | Stow Youth Baseball |
| SYBA | Shakopee Youth Baseball Association |
| SYBA | Slidell Youth Basketball Association |
| SYBA | Smithfield Youth Basketball Association |
| SYBA | Somerset Youth Baseball Association |
| SYBA | Southington Youth Basketball Association |
| SYBA | Stafford Youth Basketball Association |
| SYC | Sacramento Youth Commission |
| SYC | Sandpiper Youth Club |
| SYC | Sedalia Youth Center |
| SYC | Sierra Youth Coalition |
| SYC | Singapore Youth Choir |
| SYC | Somersworth Youth Connection |
| SYC | Special Youth Challenge |
| SYC | Springfield Youth Club |
| SYC | Storm Youth Championships |
| SYC | Summer Youth College |
| SYC | Summer Youth Conservatory |
| SYC | Super Youth Circuit |
| SYC | Surprise Youth Council |