Seattle Sounders vs. San Diego FC: A Nascent Rivalry?

Major League Soccer is about to welcome its newest member, San Diego FC, in 2025. While the club is still being built from the ground up, including player acquisitions and stadium development, a potential rivalry with the Seattle Sounders is already simmering. Several factors contribute to this intriguing possibility.

Geographic Proximity: San Diego represents a relatively close opponent for Seattle, at least within the vast expanse of MLS. The drive (or flight) isn’t quite as arduous as traversing the continent to face Eastern Conference teams. This closer proximity could foster more frequent games and easier travel for supporters, potentially leading to larger and more passionate away followings.

Cascadia Cup Considerations: While the Cascadia Cup traditionally involves Seattle, Portland, and Vancouver, San Diego’s inclusion could be disruptive or even transformative. Could San Diego eventually be absorbed into the Cascadia rivalry? While it would require delicate negotiation and acceptance from the existing teams, the possibility of expanding this historic competition adds another layer to the potential rivalry dynamic.

Expansion Team Underdog Story: As an expansion team, San Diego FC will likely begin its MLS journey as the underdog. The Sounders, a perennial playoff contender and two-time MLS Cup champion, represent the established power. This disparity could fuel a David-vs-Goliath narrative, especially if San Diego finds early success against Seattle. Underdog status can galvanize a fanbase and create a strong “us vs. them” mentality.

Southern California Flair vs. Pacific Northwest Grit: There are cultural differences between Seattle and San Diego, representing the Pacific Northwest’s reputation for grunge and grit versus Southern California’s sun-kissed, laid-back vibe. This cultural contrast could translate onto the pitch, manifesting in contrasting playing styles and fan experiences. Expect contrasting chants, tifos, and overall atmosphere at games.

Recruitment Battles: Both teams are likely to compete for players, particularly those from the Western Hemisphere. Identifying and acquiring top talent is critical for success in MLS, and San Diego’s ownership, which includes global soccer figures, will undoubtedly be aggressive in the transfer market. Head-to-head competition for players could further intensify the rivalry.

Future Significance: The success of this potential rivalry hinges on San Diego FC’s competitive strength. If San Diego struggles early on, the rivalry may never fully ignite. However, if they quickly become a force in the Western Conference, challenging Seattle for playoff spots and trophies, the rivalry could blossom into one of the most compelling in MLS. Only time will tell if the seeds of rivalry being sown today will grow into a full-blown showdown.