With young aces Jose Fernandez and Matt Harvey starting for the Marlins and Mets in Saturday 1:10 p.m. matinee, the odds of a pitching duel were pretty good. Both allowed a run over six and seven innings, respectively.

The duel extended well beyond their departures.

Adeiny Hechavarria's RBI-single in the 20th inning off Shaun Marcum sent the Marlins to a 2-1 victory in the New York twilight. The longest game in franchise history ended 6 hours, 25 minutes after it began at 1:12 p.m.

In beating the Mets for the fifth straight time, the Marlins snapped a 10-game road losing streaking and improved to 7-14 in one-run games.

Entering the 20th, the Marlins were 6 for their last 46 (.130) and just 1-for-3 with runners in scoring position.

The star of the game was Kevin Slowey, who tossed a team-record seven scoreless innings out of the bullpen to earn the win. Marcum was almost as good, allowing one run over eight relief innings.

The second Fernandez-Harvey head-to-head meeting met expectations. When they faced off on April 29 at Marlins Park, that game ended in a 15-inning, 4-3 Marlins win. During the 13 combined innings Fernandez and Harvey were in the game, the two teams scored two runs on nine hits (eight singles) with three walks and 13 strikeouts.

An elevated pitch count (97) prompted Fernandez's exit after six. Harvey went out for the eighth and threw a couple of warm-up pitches before manager Terry Collins and a trainer joined him on the mound. Harvey departed with low back tightness.

Adeiny Hechavarria represented the go-ahead run on second with no outs in the eighth. He strayed off the bag too far on Juan Pierre's bunt attempt, and John Buck threw him out 2-6-5. Pierre then grounded into an inning-ending double play.

From the sixth through 19th innings, the Marlins had one at-bat with runners in scoring position. They finished the game with nine hits in their final 51 at-bats (.176).

The Mets were worse. They went hitless in 18 at-bats with runners in scoring position, stranded 22 runners and went 10 for their last 64 (.156).