The 2015 Lamar Hunt U.S. Open Cup Final was played on September 30, 2015, at PPL Park, now known as Talen Energy Stadium, in Chester, Pennsylvania.
At the time of the final, SKC was in contention for the Supporters' Shield while the Union was in the hunt for a berth in the 2015 MLS Cup Playoffs.
Philadelphia secured its berth in the final by defeating the Rochester Rhinos, D.C. United, the New York Red Bulls, and Chicago Fire.
The Union's alternative jersey, worn throughout the competition, featured a large letter "B" in the lower left corner to honor Bethlehem.
Sporting Kansas City have previously appeared in two US Open Cup finals, winning both the 2004 and 2012 editions, and to date, are the only Kansan club to have ever won the honor.