2024

San Jose Earthquakes won on points
2024 Competition Rules

2023

San Jose Earthquakes won on points
2023 Competition Rules

2022

San Jose Earthquakes won on points
2022 Competition Rules

2021

Seattle Sounders FC won 3-2 on aggregate
2021 Competition Rules

2020

San Jose Earthquakes won based on the tiebreaker rule
2020 Competition Rules

2019

Seattle Sounders FC won on points
2019 Competition Rules

2018

Seattle Sounders FC won on points
2018 Competition Rules

2017

Seattle Sounders FC won on points
2017 Competition Rules

2016

Seattle Sounders FC won on points
2016 Competition Rules

2015

San Jose Earthquakes won on points
2015 Competition Rules

2014

San Jose Earthquakes won on points
2014 Competition Rules

2013

Seattle Sounders FC won 4-1 on aggregate
2013 Competition Rules

2012

San Jose Earthquakes won on points
2012 Competition Rules

2011

Seattle Sounders FC won on points
2011 Competition Rules

2010

Seattle Sounders FC won based on MLS standings position after 1-1 tie on aggregate
2010 Competition Rules

2009

San Jose Earthquakes won 5-2 on aggregate
2009 Competition Rules