American soccer writing, history & data.
| League | Abbreviation | Years |
|---|---|---|
| United Soccer Association | USA | 1967-1967 |
| United Soccer League | USL | 1984-1985 |
| United Soccer League | USL | 2015-present |
| United Soccer Leagues First Division | USL1 | 1997-2009 |
| United Soccer Leagues Second Division | USL2 | 1995-2014 |
| United Soccer Leagues W-League | W-League | 1994-2015 |
| United States Soccer Federation Division-2 Professional League | USSF D-2 | 2010-2010 |
| 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 |
| United Women's Soccer | UWS | 2016-present |
| USL League Two | USLL2 | 1989-2017 |
| USL Pro | USL Pro | 2011-2014 |