14 INNINGS

Padres 2

Mets 1

SAN DIEGO – Since the sixth inning on Sunday, the Met bullpen had thrown zeroes for 212/3 straight innings.

But finally, the relievers could not keep the streak alive.

In the bottom of the 14th inning last night, Chad Bradford allowed Brian Giles’ game-winning double to right, as the Mets lost to the Padres, 2-1.

After starter Brian Bannister went five innings, the bullpen threw eight scoreless frames, allowing just five hits. But Bradford, who had entered with one out and one on in the 12th inning, began the 14th by giving up Geoff Blum’s pinch-hit single to center.

Giles then sent an opposite-field shot to left, the ball going to the wall. Cliff Floyd threw it in to Jose Reyes, but his relay to the plate was just late.

The Mets have now lost three of their last four. Last night was their longest game in nearly two years – they played 15 frames against the Twins on June 10, 2004.

Aside from Thursday’s six-run eighth inning, the Mets have not scored much this week. In their other 26 innings from Tuesday through Thursday, they scored only three runs, and against veteran righty Woody Williams last night, the offense didn’t muster much again.

Carlos Delgado put the Mets up 1-0 in the fourth inning, blasting a solo homer to center, his team-high seventh. But the Mets had only three other hits over the first eight innings against Williams (8 IP, 1 ER).

Bannister held the Padres to one run in five innings, but he was in trouble in four of his frames, giving up four hits and walking six while throwing a shaky ratio of 51 strikes to 49 balls.

Bannister has a 2.35 ERA this year, and for a rookie, he has done a very good job. But in his four starts, he’s pitched 23 innings and walked 15, which is disturbing. He’s also lasted only five innings in each of his last two outings, despite giving up only one run each time.

Last night, Bannister got embroiled in multiple early-inning jams, getting out of all of them.

In the first inning, the righty loaded the bases with two outs on a Josh Barfield single and walks to Mike Piazza and Adrian Gonzalez. Paul Lo Duca and pitching coach Rick Peterson came out to the mound after the latter free pass, and on a 3-2 count, Bannister struck out Khalil Greene swinging.

Two innings later, Bannister put men on first and third with two outs for Gonzalez but got him on a grounder to first. And in the fourth, with the Mets up 1-0 on Delgado’s homer, Bannister had two on and two outs after an error and a walk, but he fanned Dave Roberts looking to end the inning.

But in the fifth, Bannister couldn’t stop San Diego. Barfield knocked an infield single and stole second, the third stolen base of the game for the Padres off Paul Lo Duca, who’s thrown out 1-of-17 this year. Giles walked, bringing up Piazza with two on and none out.

Bannister got Piazza on a 6-4-3 double play. But Gonzalez singled to right, bringing in Barfield to tie the game. Bannister then walked Greene to put two on again but caught Vinny Castilla looking to end the inning.

In the seventh, the Mets put two on with one out when Xavier Nady was hit by a pitch and Kazuo Matsui singled him to third. Endy Chavez then hit a soft grounder to first and Gonzalez threw home to get Nady at the plate. Nady tried a feet-first slide but was tagged out by Piazza.

With Darren Oliver now up, Willie Randolph had ailing Carlos Beltran pinch hit, and Beltran hit the ball hard to the right side. Barfield, though, made a diving stop to get it and throw Beltran out.

Facing star closer Trevor Hoffman in the ninth, Floyd hit a one-out infield single and stole second with two outs. But Matsui struck out, stranding him.

mark.hale@nypost.com