NEW YORK -- Oliver Perez always has been the emotional sort.

The Pirates saw it for years when he was in their employ, and they saw it again this afternoon in their 13-1 annihilation of the New York Mets at Shea Stadium, when he lasted only 1²/₃ innings and was charged with seven runs on two hits and a ghastly total of five walks.

Almost all of that damage was wrought in a seven-run second.

Was the opponent a coincidence?

Probably not.

The only other time Perez faced his old mates since being traded in mid-2006 came last July, and crumbled in that one, too, starting strong but giving up five runs and making a critical error that led to an 8-4 loss, also at Shea.

Still, he rejected the effect of facing the Pirates: "No, this is not the first time I faced my old team. I just have to make outs."

The Pirates had plenty to relish on this day, from Tom Gorzelanny's rebound five innings, to Nady and Nate McLouth -- who else? -- each racking up three more hits and three more RBIs, to a season-high output for runs. Nady reached base all five times up, McLouth four times.

"There were some walks, but we took advantage of them with some big hits," manager John Russell said. "We swung the bats really well."

"He was a little erratic," Nady said of Perez. "We just wanted to be patient and try to put some pressure on him."

"It was nice to get the big lead," McLouth said. "How's that for an answer?"

That was a reference to the Pirates' failure to capitalize on numerous chances in a 5-4, 11-inning loss last night.

Still, there can be no question that Perez's start, as well as some abysmal play by the home side was the far greater variable: Nine of the Pirates' runs were unearned, thanks to three New York errors and several other lapses and miscues.

Each one brought a torrent of boos from the crowd of 46,788, just as each third out brought mock cheers.

"In 162 games, you're going to have stinkers like that," Mets manager Willie Randolph said.

"It was one of those days," third baseman David Wright said. "We didn't do a lot of things right, and they did a lot of things right."

Perez opened that big second inning by walking Nady and, after fanning Adam LaRoche, he and his teammates began the meltdown ...

Two more walks loaded the bases for Gorzelanny, a career .045 hitter, and his double-play bouncer was muffed by second baseman Luis Castillo. One run in, bases still filled.

McLouth walked to keep the cycle going. Freddy Sanchez singled, Jason Bay hit a sacrifice fly, and Ryan Doumit singled, each bringing one more run. Doumit managed to take an extra base on his, thanks to shortstop Jose Reyes failing to cover second.

Nady's two-run liner into right-center made it 7-0.

The sixth was even more farcical: Back-to-back doubles by Doumit and Nady brought one run and, after two outs, an error by Wright allowed another and two grisly misplays by left fielder Angel Pagan led to three more.

That made it 13-0.

Gorzelanny was wild, too, walking five in as many innings to maintain his unfortunate season ratio. But he also held the Mets scoreless with one hit in what all concerned saw as encouraging, especially after a seven-walk loss to the St. Louis Cardinals in his previous outing.

Gorzelanny provided a slight scare with two outs in the fifth, when he leaned forward after a pitch to Wright and grabbed his lower back in an apparent recurrence of some minor pain he experienced there April 13. But, after the athletic trainers visited the mound, he remained and retired Wright to qualify for the victory and improve to 2-3.

He was pulled after that, which would have happened, anyway, according to the Pirates, because of his pitch count of 84. He is expected to make his next start Tuesday.

"The back just tightened a little bit," Gorzelanny said. "It just happened on that one pitch. It's something I'm going to have to deal with, but I'll be fine."

Of his command, he said, "It got a little better. I still had five walks, so I need to do better. But I felt more confident, more aggressive than I had been."

The game began at 1:50 p.m., after being delayed by a water-main break near Shea Stadium.