San Jose Earthquakes vs. Seattle Sounders FC is a active prediction market event on Polymarket with 3 markets, $797.7K total volume, and $581.1K in liquidity. Key markets: Will San Jose Earthquakes win on 2026-03-15?; Will San Jose Earthquakes vs. Seattle Sounders FC end in a draw?; Will Seattle Sounders FC win on 2026-03-15?.