In the fourth round, Seattle faced amateur side Cal FC, coached by former U.S. national team star Eric Wynalda. Cal FC had qualified for the tournament through the USASA regional qualification process. In the tournament they upset several teams, including the Portland Timbers of MLS–shutting them out 1-0–prior to facing Sounders FC. The fourth round match was played on June 5, 2012 at Starfire in front of a crowd of 3,894. Because of the uniqueness of an amateur team making it so deep in the tournament and then facing the 3-time defending champion Seattle, the match was televised nationally on Fox Soccer. Cal FC kept the game close during the first half keeping the score 0–0 at halftime. However, Seattle would not be denied in the second half finally taking the lead in the 50th minute on a penalty kick by Osvaldo Alonso. Sounders FC went on to score 4 more goals with forward Fredy Montero scoring two, Andy Rose with one, and Osvaldo Alonso with his second of the game. The match ended with a final score of 5–0.
