American soccer writing, history & data.
| Season | Name | Abbreviation | Champion | Champion (Tier 2) | Champion (Tier 3) |
|---|---|---|---|---|---|
| 1996 | Major League Soccer | MLS | D.C. United | - | - |
| 1997 | Major League Soccer | MLS | D.C. United | - | - |
| 1998 | Major League Soccer | MLS | Chicago Fire SC | - | - |
| 1999 | Major League Soccer | MLS | D.C. United | - | - |
| 2000 | Major League Soccer | MLS | - | - | - |
| 2001 | Major League Soccer | MLS | - | - | - |
| 2002 | Major League Soccer | MLS | - | - | - |
| 2003 | Major League Soccer | MLS | - | - | - |
| 2004 | Major League Soccer | MLS | - | - | - |
| 2005 | Major League Soccer | MLS | - | - | - |
| 2006 | Major League Soccer | MLS | - | - | - |
| 2007 | Major League Soccer | MLS | - | - | - |
| 2008 | Major League Soccer | MLS | - | - | - |
| 2009 | Major League Soccer | MLS | - | - | - |
| 2010 | Major League Soccer | MLS | - | - | - |
| 2011 | Major League Soccer | MLS | - | - | - |
| 2012 | Major League Soccer | MLS | - | - | - |
| 2013 | Major League Soccer | MLS | - | - | - |
| 2014 | Major League Soccer | MLS | - | - | - |
| 2015 | Major League Soccer | MLS | - | - | - |
| 2016 | Major League Soccer | MLS | - | - | - |
| 2017 | Major League Soccer | MLS | - | - | - |
| Organizing body | Dates |
|---|---|
| Major League Professional Soccer, Inc. | June 24, 1993 – date unknown |
| Major League Soccer, L.L.C. | July 24, 1995 – date unknown |