Chad Marshall headed in a corner kick from Marco Pappa in the 84th minute Saturday night as the Seattle Sounders completed a comeback from a first-half own goal to beat the Philadelphia Union 2-1.
The Sounders (6-2-1) won their MLS-leading fourth straight game, extended their unbeaten streak to five and took the overall league lead with 19 points.
Philadelphia (1-4-5) saw its winless streak extended to eight games (0-4-4), tying a club record that was first set in 2011 and matched in 2012.
Pappa's corner kick from the right side floated into the penalty area just outside the 6-yard box. Marshall ran and headed it high into the net over goalkeeper Zac MacMath for his first of the year.
Brad Evans gave the Union the lead in the 13th minute. Obafemi Martins tied it for Seattle in the 61st minute, his fourth goal of the season.