American soccer writing, history & data.
| League | Abbreviation | Years |
|---|---|---|
| United Soccer Leagues A-League | USL A-League | 1997-2004 |
| United Soccer League | USL | 1984-1985 |
| United Soccer Leagues D3 Pro League | USL D3 Pro | 1995-2002 |
| United Soccer Leagues Premier Development League | USL PDL | 1989-2018 |
| United Soccer Leagues W-League | USL W-League | 1994-2015 |
| United Systems of Independent Soccer Leagues I-League | USISL I-League | 1986-1998 |
| United Systems of Independent Soccer Leagues Select League | USISL-Select | 1996-1996 |