Norm Hall/Getty ImagesArizona's Cody Ross suffered a dislocated right hip running to first base in the first inning.
It was Brown's second career pinch-hit homer. He also went deep in that role June 20 against Atlanta Braves left-hander Mike Minor.
Wilmer Flores produced a ninth-inning solo homer against Heath Bell -- the rookie's first big league long ball. It extended Flores' streak of games with an RBI to five. Flores now has nine RBIs in his first six major league games.
Staked to a 5-1 lead, Niese served up a three-run homer to Aaron Hill in the third that pulled Arizona within a run. But Niese, who had been on the disabled list with a partial tear of the rotator cuff in his left shoulder since a June 20 start, completed his outing with three straight scoreless innings.
He created his own jam in the sixth when he fielded Tuffy Gosewisch's comebacker and then bounced a throw to second base attempting to initiate a double play. But Niese rallied to strand two baserunners and preserve a 5-4 lead by consecutively striking out Cliff Pennington and pinch hitter Jason Kubel.
Walk in the park:Ike Davis, now batting .205, reached base eight straight plate appearances over two games before a ninth-inning strikeout. Davis had three walks and a single Sunday.
Bad run: The Mets had four runners thrown out on the bases in the series. In the series finale, Mike Baxter was retired at the plate trying to score from first base on Omar Quintanilla's third-inning single. Marlon Byrd (attempting an inside-the-park homer) and Juan Lagares (attempting a triple) were thrown out Friday. Flores was retired going first to third Saturday.
Olé: The Mets scored four unearned runs in the first inning. Rookie Zeke Spruill was poised to escape a bases-loaded, two-out jam unscathed. But first baseman Paul Goldschmidt missed Baxter's would-be inning-ending grounder and three runs scored. Anthony Recker followed with a run-scoring double past third baseman Martin Prado.
Ouch: Arizona's Cody Ross dislocated his right hip running to first base on a first-inning groundout.
What's next: The Mets open a three-game series in Los Angeles against the red-hot Dodgers. Jenrry Mejia (1-1, 1.96 ERA) opposes right-hander Ricky Nolasco (8-9, 3.65) in Monday's 10:10 p.m. ET series opener. The Mets will avoid facing Zack Greinke and Clayton Kershaw in the series.