| Abbreviation | Definition |
|---|---|
| ATSC | Advanced Total Soccer Coaching |
| AUSA | Athens United Soccer Association |
| AYSA | Alabama Youth Soccer Association |
| AYSA | Alaska Youth Soccer Association |
| AYSA | Altoona Youth Soccer Association |
| AYSA | Amherst Youth Soccer Association |
| AYSA | Appleseed Youth Soccer Association |
| AYSA | Arizona Youth Soccer Association |
| AYSA | Arrowhead Youth Soccer Association |
| AYSA | Ashwaubenon Youth Soccer Association |
| AYSA | Auburn Youth Soccer Association |
| AYSF | Atlanta Youth Soccer Foundation |
| AYSO | American Youth Soccer Organization |
| BAR | FC Bayern Munich |
| BASA | Barrington Area Soccer Association |
| BASA | Bay Area Soccer Association |
| BASC | Bucks Adult Soccer Club |
| BASL | Baltimore Adult Soccer League |
| BASL | Bartlesville Adult Soccer League |
| BASL | Bay Area Soccer League |