LA Galaxy's decision to bring Zlatan Ibrahimovic paid immediate dividends with two goals to complete a 4-3 victory over Los Angeles FC.
Atlanta United has confirmed Gerardo Martino will leave the club at the end of the MLS season after rejecting a new contract.
Zlatan Ibrahimovic scored as LA Galaxy boosted their MLS play-off chances, while DC United and the Portland Timbers secured their places on Monday (AEDT).
DC United moved into a play-off spot after a dramatic 1-0 win over Dallas in Major League Soccer on Sunday (AEDT).
Seattle Sounders moved a step closer to clinching a play-off berth courtesy of a crushing 4-1 win over Houston Dynamo in MLS.
Atlanta United closed in on the MLS Supporters' Shield with another win, while New York Red Bulls stayed in touch.
MLS: DC United v NYCFC