Rapid Reaction: Padres 4, Mets 3

SAN DIEGO -- The Mets spoiled the inaugural Matt Harvey-Travis d’Arnaud Battery Day with a walk-off loss.

Gonzalez Germen surrendered a game-tying eighth-inning run. Then, Will Venable produced a walk-off homer an inning later against Pedro Feliciano as the Mets lost to the San Diego Padres, 4-3, Sunday afternoon at Petco Park.

The Mets suffered their 12th walk-off loss of the season, matching the Miami Marlins for the most in the majors.

The Mets split the four-game series with the Padres. They have won only one series in San Diego since 2002.

Harvey was in line for his 10th win until Germen’s eighth-inning hiccup instead handed him a no-decision.

Harvey had been lifted for pinch hitter Andrew Brown after Omar Quintanilla doubled with two outs and the score tied in the top of the seventh. Brown proceeded to double to chase left-handed starter Eric Stults and give the Mets a 3-2 lead.

With Jenrry Mejia (elbow) on the disabled list, Terry Collins indicated the Mets are weighing two options for Friday’s start against the Detroit Tigers: bringing back Harvey on regular rest, or giving a start to Carlos Torres.

Because he only logged 86 pitches in six innings against San Diego, that may suggest Harvey pitches Friday, rather than with an extra day of rest Saturday. In essence, the Mets would use Thursday’s team off-day to skip Mejia’s turn.

Harvey’s line: 6 IP, 6 H, 2 R, 2 ER, 0 BB, 6 K.

It marked the eighth time this season Harvey had failed to earn a win in a start in which he logged at least six innings and surrendered two runs or fewer. Cole Hamels leads the majors with 10 such starts.

The Padres scored twice against Harvey in the fifth, with not much hit hard. The damage came on a hit by pitch, bloop single that narrowly dropped beyond second baseman Justin Turner’s reach, a sac bunt, infield single and sac fly.

Brown delivers: Brown is 5-for-8 with one homer and five RBIs on the road trip.

D’oh: In his second major league game, d’Arnaud went 0-for-2 with two walks and a passed ball. He grounded into a second-inning double play. D’Arnaud is 0-for-4 with four walks in two major league starts.

John Buck is due to return from paternity leave Tuesday, at which point the Mets will need to decide whether d’Arnaud remains at the major league level.

What’s next: The Mets take a detour to Minneapolis to make up a snowed-out April game and complete a four-city, 11-game trip. Dillon Gee (8-8, 3.79 ERA) opposes right-hander Kyle Gibson (2-3, 6.27) at 2:10 p.m. ET Monday at Target Field.