1. Seattle Sounders - Portland Timbers 2. NY Red Bulls - NYCFC 3. Toronto FC - Montreal Impact 4. Houston Dynamo - FC Dallas 5. FC Cincinnati - Columbus Crew SC 6. LA Galaxy - LAFC
Before the over-expansion of MLS: Metrostars vs DC LA Galaxy vs San Jose Since the over-expansion of MLS, its hard to say, there are so many derbys now but probably: Seattle vs Portland New York vs New York Los Angles vs Los Angeles You can't list Cincinnati vs Columbus because they haven't played a game yet in MLS.
I'd go out on a limb and say that Portland v Seattle (and maybe the NYFC vs NYRB games) are the only one's that should get a mention. The others are just local games against each other.
Agreed, I can't wait. Though technically Cincy and Columbus did meet once in the U.S. Open Cup. That one game has only made fans hungry for more!
To be fair, Seattle-Portland and the NY Derby are just local games too. In defense of what I hope will be a very passionate match-up I hope the Ohio Derby will be considered something like Bears-Packers. Not as sexy a matchup as Patriots-Jets but one people are excited to tune in for. Fingers crossed!