between the two sides at Subaru Park on June 16, 2022, an altercation occurred during a stoppage in play between New York City players and a member of the Philadelphia Union medical staff who was treating an injured player on the field. This resulted in a red card being shown to the trainer Paul Rushing, and expletives can be heard being shouted from the home fans. The winning goal of the game was scored by the Union in the 96th minute, leading to an eruption from the crowd, including a smoke bomb being thrown onto the field. After the game ended, Union player José "El Brujo" Martínez was photographed showing both middle fingers to the traveling NYCFC supporters. This game marks a major development in the rivalry. The Union would avenge their 2021 Eastern Conference final loss, defeating NYCFC 3–1 at home to win the 2022 Eastern Conference final, and earn their first ever appearance in an MLS Cup final. Another rivalry with Los Angeles FC has started to take shape, more-so because of events on the field than animosity between fans, as many entertaining and heated fixtures between the two teams have occurred since LAFC joined the league. MLS Cup 2022 between LAFC and the Philadelphia Union ended in a 3-3 draw after extra time that eventually led to LA winning via a penalty shootout. LAFC also won the Supporter's Shield in 2022, being crowned champions of the regular season over the Philadelphia Union thanks to MLS' win record tie-breaker. This tie-breaker differs from the more common goal differential tie-breaker used in most other professional soccer leagues in the world. The Philadelphia had a higher goal-differential at the conclusion of the 2022 regular season than LAFC. The Union also has several other minor rivals. A smaller rivalry with D.C. United took shape early on due to their geographical proximity compared to other teams in the league. Other teams such as the New England Revolution and Atlanta United F.C. have been considered rivals to some extent in recent years due to many intense and important games against them, and some controversial moments. The Union also had a period of rivalry with Seattle Sounders FC despite the two teams playing in different MLS conferences. The Philadelphia Union played its inaugural MLS game and stadium opener against the Seattle Sounders. The rivalry was further cultivated by the 2014 Lamar Hunt U.S. Open