The 2014 Lamar Hunt U.S. Open Cup Final was played on September 6, 2014, at PPL Park in Chester, Pennsylvania. The match determined the winner of the 2014 Lamar Hunt U.S. Open Cup, a tournament open to amateur and professional soccer teams affiliated with the United States Soccer Federation. This was the 101st edition of the oldest competition in United States soccer. Seattle Sounders FC won the match, defeating the Philadelphia Union in Pennsylvania. The crowd of 15,256 saw the teams go into extra time level at 1–1 before the Sounders scored twice more to end the match 3–1.

Philadelphia and Seattle both play in the top tier of American soccer, Major League Soccer (MLS), and bypassed the initial stages of the tournament with entries into the third round of play. The Sounders were in the midst of a Supporters' Shield-winning regular season, while the Union's start was so poor that their coach was replaced a week prior to their first game in the competition. Philadelphia secured its berth in the final by defeating the Harrisburg City Islanders, the New York Cosmos, the New England Revolution, and FC Dallas. Seattle's road to the final included victories over PSA Elite, the San Jose Earthquakes, the Portland Timbers, and the Chicago Fire.

The coaches both chose strong squads in their attempts to win the trophy, though Sounders forward Kenny Cooper, later selected as Player of the Tournament, did not appear in the final. The Union's Maurice Edu gave his team the lead with a goal in the first half, but the Sounders equalized with a second half strike by Chad Barrett, and the match went into extra time. Although Philadelphia controlled periods of the match with chances throughout, Clint Dempsey took the lead for Seattle in the first extra time period, and Obafemi Martins sealed a Seattle victory with a late goal. Seattle earned a $250,000 cash prize, as well as a berth into the 2015–16 CONCACAF Champions League. Philadelphia received a $60,000 cash prize as the competition's runner-up.

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