Gregory Polanco singled home the go-ahead run in the 10th inning and the Pittsburgh Pirates ended the Mets' seven-game home winning streak, stopping New York 3-2 Friday night.
The teams went into extra innings at 1-all. Polanco singled off Bobby Parnell (1-2) and Aramis Ramirez hit a sacrifice fly against Carlos Torres.
The NL East-leading Mets scored in the bottom half on Curtis Granderson's sacrifice fly before Mark Melancon finished for his 36th save.
Arquimedes Caminero (3-1) pitched a scoreless ninth for the win.
Neil Walker homered with one out in the Pirates first off Bartolo Colon, sending a drive into the Pittsburgh bullpen.
The playoff-contending homered in their eighth straight game for the first time in a single season since June 2013, STATS said.
Colon wound up pitching seven innings, giving up five hits while striking out seven.
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Yoenis Cespedes hit his 20th home run overall, and second since being traded to the Mets, with a tying drive in the sixth.
It was the Mets' 15th long ball in their last 19 games, and tied a franchise record with 67 homers in a season with 67.
Making his second start joining the Pirates, J.A. Happ allowed seven hits in 5 1-3 innings.
Backup catcher Chris Stewart led off the Pittsburgh 10th with a single and was pulled for pinch-runner Starling Marte, out of the starting lineup because of a bruised left hand.
Pinch-hitter Francisco Cervelli sharply singled to left on a full count, sending the speedy Marte to third. Polanco lined Parnell's first pitch up the middle.
Juan Lagares led off the Mets 10th with a double, and a wild pitch set up Granderson's fly. Melancon struck out Cespedes and retired Juan Uribe on a grounder.
