- 2023 – FC Cincinatti
- 2022 – Los Angeles Football Club
- 2021 – New England Revolution
- 2020 – Philadelphia Union
- 2019 – Los Angeles Football Club
- 2018 – New York Red Bulls
- 2017 – Toronto FC
- 2016 – FC Dallas
- 2015 – New York Red Bulls
- 2014 – Seattle Sounders FC
- 2013 – New York Red Bulls
- 2012 – San Jose Earthquakes
- 2011 – Los Angeles Galaxy
- 2010 – Los Angeles Galaxy
- 2009 – Columbus Crew
- 2008 – Columbus Crew
- 2007 – D.C. United
- 2006 – D.C. United
- 2005 – San Jose Earthquakes
- 2004 – Columbus Crew
- 2003 – Chicago Fire
- 2002 – Los Angeles Galaxy
- 2001 – Miami Fusion
- 2000 – Kansas City Wizards
- 1999 – D.C. United
- 1998 – Los Angeles Galaxy
- 1997 – D.C. United
- 1996 – Tampa Bay Mutiny