Reyna's fourth goal of the season came after he earned an earlier penalty for D.C. United, awarded after a Video Review for a foul by Alvas Powell, and converted by Ola Kamara for his team-leading 12th goal of the season.
Ramon Abila added his fourth goal of the season – and second since his arrival in D.C. United this month – in second-half stoppage halftime to seal the Black & Red's first win over the Union since 2017.
The Black-and-Red also avoided a season sweep after Philadelphia won the first meeting 1-0 in Washington in May and a return fixture 2-1 at Subaru Park in July.
But the Union were outshot 14-10 overall and 9-2 in efforts on target. All-Star goalkeeper Andre Blake made six saves to keep the visitors in it, including two exceptional diving stops in the first half.
- THE BIG PICTURE: D.C. United's victory snapped one of the longer runs of MLS rivalry dominance in recent memory. The Union went 10 games without defeat, winning nine of those and building a +19 goal differential in the series over that stretch.
- MOMENT OF THE MATCH: The Black-and-Red appeared headed for even more frustration when the Union took the lead largely against the run of play. But then they got a break they needed – and earned, frankly – when referee Rubiel Vazquez was called over to review a potential penalty kick foul on Powell.
- MAN OF THE MATCH: Yordy Reyna gets the nod for making the two plays that mattered most: reaching a 50-50 ball before Powell to win a penalty, and showing up in the perfect spot to slam home a rebound after Kamara's header forced Blake into another save.