Tesho Akindele blasted in the go-ahead goal in the 86th minute and FC Dallas rallied for a 2-1 victory over the Galaxy on Saturday night.
Mauro Diaz, who assisted on both goals, set up Akindele with a diagonal cross from near midfield as the Galaxy's five-game unbeaten streak came to an end.
Blas Perez pulled FC Dallas (6-2-2) even in the 77th minute, slipping past goalkeeper Jaime Penedo for an open-net finish. Diaz floated a chip pass over the Galaxy defense to create the space for Perez.
FC Dallas remained first in the overall MLS standings, tied with the Vancouver Whitecaps.