|Cain: 2-for-5, 3 RBI|
Cain also started a ninth-inning rally in the ninth, walking, stealing second and coming home with the Royals' first run off mets' starter, Matt Harvey, on Eric Hosmer's double.
Jeurys Familia relieved Harvey with no outs in the ninth, and, in an odd quirk of scoring, had his third blown save of the series, despite getting all three batters he faced in the inning to ground out.
Mike Moustakas grounded out to first, sending Hosmer to third. Salvador Pérez grounded out to third, as Hosmer scored the tying run. With the bases empty, Alex Gordon grounded out to Familia, but the damage had been done.
Perez, who batted .364 for the five games, was named series MVP.
After the Royals tied the score, Familia retired the side in the 10th and neither team mounted a rally until the Royals came to bat in the 12th.
Perez opened the frame with a single off reliever Addison Reed, and was pinch run for by Jarrod Dyson, who promptly stole second. With one out, pinch hitter, Christian Colon singled in Dyson with what proved to be the game-winner, but the Royals were far from done.
After an error by second baseman Daniel Murphy put runners on first and second, Alcides Escobar doubled to right, scoring Colon. A walk to Ben Zobrist loaded the bases, bringing in Bartolo Colon to pitch to Cain.
Cain unloaded on Colon, putting the game out of reach. Wade Davis itched a scoreless bottom of the 12th. Like Hochevar, who worked the 11th inning, was credited with the win.
The Royals won in five games, taking games one and two in Kansas City, 5-4 and 7-1, respectively, losing game three, 9-3, rallying to win game four, 5-3. They finished off the Mets in 12 innings in game five, 7-2.