Zlatan Ibrahimovic scored and provided an assist in LA Galaxy's win over Sporting Kansas City to silence the boos of vocal away crowd.
The Swedish star headed a cross into the path of Favio Alvarez to nod in the opener in the 55th minute.
Ibrahimovic, returning from a two-game suspension, sealed the win late on, volleying in an Uriel Antuna cross for his 10th goal of the season.
Galaxy are six points adrift of Los Angeles FC, while Sporting are 11th in the Western Conference.
Atlanta United snapped a two-game losing streak thanks to a 3-0 victory at home to Minnesota United.
Franco Escobar's fine 23rd-minute finish put Atlanta ahead, but they had to wait until late on to wrap up their victory.
Martinez scored twice in additional time to take his tally to eight MLS goals this campaign.
Atlanta are fourth in the Eastern Conference, where the top two in DC United and Philadelphia Union dropped points.
Wayne Rooney provided an assist but DC were held to a thrilling 3-3 draw at home to Chicago Fire.
Philadelphia, meanwhile, played out a 1-1 draw against the struggling Colorado Rapids.
However, third-placed Montreal Impact made no mistake, edging Real Salt Lake 2-1 in Quebec.