| 1996 | DC United | Los Ángeles Galaxy |
| 1997 | DC United | Colorado Rapids |
| 1998 | Chicago Fire | DC United |
| 1999 | DC United | Los Ángeles Galaxy |
| 2000 | Kansas City Wizards | Chicago Fire |
| 2001 | San Jose Earthquakes | Los Ángeles Galaxy |
| 2002 | Los Ángeles Galaxy | New England Revolution |
| 2003 | San Jose Earthquakes | Chicago Fire |
| 2004 | DC United | Kansas City Wizards |
| 2005 | Los Ángeles Galaxy | New England Revolution |
| 2006 | Houston Dynamo | New England Revolution |
| 2007 | Houston Dynamo | New England Revolution |
| 2008 | Columbus Crew | New York Red Bulls |
| 2009 | Real Salt Lake | Los Ángeles Galaxy |
| 2010 | Colorado Rapids | FC Dallas |
| 2011 | Los Ángeles Galaxy | Houston Dynamo |
| 2012 | Los Ángeles Galaxy | Houston Dynamo |
| 2013 | Sporting Kansas City | Real Salt Lake |
| 2014 | Los Angeles Galaxy | New England Revolution |
| 2015 | Portland Timbers | Columbus Crew |
| 2016 | Seattle Sounders | Toronto |
| 2017 | Toronto | Seattle Sounders |
| 2018 | Atlanta United FC | Portland Timbers |
| 2019 | Seattle Sounders | Toronto |
| 2020 | Columbus Crew | Seattle Sounders |
| 2021 | New York City FC | Portland Timbers |
| 2022 | Los Ángeles F.C | Philadelphia Union |