The Philadelphia Union became the sixteenth team competing in Major League Soccer in when they were a part of the league's expansion in 2010. The club plays its home matches on the bank the Delaware River in PPL Park, a soccer-specific stadium located in Chester, Pennsylvania. Chester is a satellite city outside of Philadelphia, Pennsylvania.
The new club saw an enthusiastic following as they opened their inaugural season in a 3-1 win over D.C. United- with all 12,000 season tickets sold out prior to kick off. The young club has a devoted following, referred to as the "Sons of Ben" (in reference to Benjamin Franklin, a Philadelphia icon). The club has main rivalries with both DC United and New York Red Bull due to geographic proximity. Notable players include Alejandro Moreno, Jordan Harvey, and Danny Califf.
The Philadelphia Union sports a navy blue and gold kit, the primary colors of the Continental Army during the American Revolutionary War, and the Rattlesnake in the emblem resembles the 1754 political cartoon by Benjamin Franklin in the Pennsylvania Gazette.