| Abbreviation | Definition |
|---|---|
| ALAW | All Leeds Aren’t We |
| AMSA | Austin Men's Soccer Association |
| AMSA | Austin Mens' Soccer Association |
| AMSL | Alberta Major Soccer League |
| AMSL | Aurora Minor Soccer League |
| AMU | Anti-Manchester United |
| ANSL | American National Soccer League |
| APSD | Air Power Soccer Disc |
| APSL | Alliance Premier Soccer League |
| APSL | American Premier Soccer League |
| APSL | American Professional Soccer League |
| ASC | Albion Soccer Club |
| ASDG | Austin Soccer Development Group |
| ASFC | Accrington Stanley Football Club |
| ASL | American Soccer League |
| ASL | Atlantic Soccer League |
| ASL | ATLANTIC SOCCER LEAGUE Atlantic Soccer League |
| ASLC | Amateur Soccer League of Connecticut |
| ASSA | Arkansas State Soccer Association |
| ASSC | Amarillo Select Soccer Club |