2016_Seattle Sounders
2015_Portland Timbers
2014_Los Angeles Galaxy
2013_Sporting Kansas City
2012_Los Angeles Galaxy
2011_Los Angeles Galaxy
2010_Colorado Rapids
2009_Real Salt Lake
2008_Columbus Crew
2007_Houston Dínamo
2006_Houston Dínamo
2005_Los Angeles Galaxy
2004_D.C. United
2003_San José Earthquakes
2002_Los Angeles Galaxy
2001_San José Earthquakes
2000_Kansas City Wizards
1999_D.C. United
1998_Chicago Fire
1997_D.C. United
1996_D.C. United
FUENTE: Associated Press