MLB

Mets bullpen implodes in loss to Brewers

MILWAUKEE — The man’s first name is Prince, but his only claim to majesty is he’s a royal pain in the rump for opposing pitchers.

Prince Fielder made the Mets his victims last night, leaving Mike Pelfrey and Jason Isringhausen to shake their respective heads in disgust. Nyger Morgan’s RBI double in the ninth inning was the dagger that killed the Mets in a 7-6 loss to the Brewers at Miller Park, but Fielder might as well have carried his team by himself.

The hefty first baseman slugged two home runs — including one to tie the game as part of the Brewers’ four-run eighth inning — deflating the Mets after they had moved to the cusp of a fourth straight victory.

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“There’s an empty feeling, because we thought we had that one pretty much wrapped up,” said manager Terry Collins, who watched the Mets score five runs in the eighth to take a 6-2 lead before handing the game to Pedro Beato.

The rookie Beato allowed a two-run double to Ryan Braun, bringing Fielder to the plate as the tying run. Collins summoned Isringhausen with first base open and reminded the veteran righty to be careful with Fielder. But Fielder crushed a 1-1 fastball over the left-field fence for his sixth homer in as many games. In the ninth, Dale Thayer (0-1) allowed a single to Craig Counsell, who stole second and scored the winning run on Morgan’s double.

“I made a mistake [to Fielder] — I knew I had first base open, and as hot as he’s been I shouldn’t give him anything to hit there and the ball caught a lot of the plate,” Isringhausen said. “I made a mistake, and that’s what he is doing to mistakes right now.”

The Mets had grabbed a 6-2 lead earlier in the inning. The big hit was Ronny Paulino’s three-run homer off Kameron Loe after the Mets had gone ahead on Angel Pagan’s RBI single.

Jose Reyes began the rally with a single and steal of second before Justin Turner walked and Carlos Beltran delivered an RBI double that made it 2-2. Pagan’s ensuing RBI single and Paulino’s bomb appeared to be game over, but not so fast.

The Mets received a fifth consecutive strong performance from a starting pitcher, as Pelfrey rebounded from a stinker against the Pirates by allowing two runs on four hits over six innings with no walks.

The right-hander’s lone misstep came in the fourth, when Fielder got the green light on a 3-0 pitch and hammered a fastball over the right-field fence.

“I hate walking guys, and obviously I threw the ball right down the middle,” Pelfrey said. “He’s got 17 home runs for a reason. It’s because he doesn’t let mistakes like that go.”

In the fourth, Jason Bay had scored from third on Randy Wolf’s balk to give the Mets a 1-0 lead. Bay, who finished 0-for-3 and ran his hitless streak to 23 at-bats, was hit by a pitch and went to third on Paulino’s single with one out.

The chess game between Collins and Brewers manager Ron Roenicke began in the seventh with Paulino on first base and two outs. Scott Hairston was announced as a pinch-hitter for Pelfrey, prompting Roenicke to remove Wolf. Collins countered with Daniel Murphy to face the righty Loe. The Brewers won the battle, with Murphy grounding out sharply.

mpuma@nypost.com