Sekagya's second goal of the season made it 2-1 in the 49th minute, and Lloyd Sam scored seven minutes later for a 3-1 Red Bulls lead. Reserve Eric Alexander converted a breakaway chance in the 77th minute on a through pass from Luyindula.
Chicago (14-13-7) took a 1-0 lead in the sixth minute on Mike Magee's league-leading 21st goal of the season. Quincy Amarikwa scored in the 90th minute for the Fire.
Galaxy 1, Sounders 1 • Clint Dempsey scored in the 30th minute for host Seattle in his ninth game back in Major League Soccer, and Robbie Keane's half-volley late in the second half gave Los Angeles a 1-1 draw in the MLS regular-season finale.
Dempsey's goal off a cross from Lamar Neagle gave Seattle (15-12-7) a chance at finishing third in the Western Conference, but Keane's goal in the 78th minute in front of another massive crowd of 66,218 changed the entire playoff picture.
Keane's goal gave the Galaxy (15-11-8) third place in the final standings. Los Angeles will face Real Salt Lake in the two-leg conference semifinals. Seattle will now host Colorado in the play-in round on Wednesday, with the winner getting Portland in the conference semifinals.
Revolution 1, Crew 0 • In Columbus, Ohio, Juan Agudelo scored midway through the first half to help New England qualify for the postseason for the first time since 2009.
Dynamo 2, United 1 • In Washington, Boniek Garcia and Giles Barnes scored in the first half, and Houston beat D.C. United to wrap up a playoff spot for the third straight season.