MONTREAL (Ticker) -- The Philadelphia Phillies are a traveling nightmare.

Jose Vidro belted a grand slam in the bottom of the 10th inning as the Montreal Expos rallied for a 13-9 victory over the Philadelphia Phillies, who continued their horrific play away from home.

Just 4-19 on the road entering the contest, the Phillies squandered a three-run lead in the bottom of the eighth inning, then watched closer Jose Mesa give away a 9-8 advantage in the ninth.

"I wouldn't call it a jinx," said Phillies reliever Ricky Bottalico, who struggled in the eighth. "I just think we're not playing well on the road, period. Look at tonight's game, we were down early and the guys fought back and scored some runs. We just didn't finish it off as a bullpen. That's the bottom line. Whatever happens, happens. You just play the game and try to finish it off. We didn't get the job done."

Hector Mercado (1-1), who has struggled all season, started the 10th and promptly walked Brad Wilkerson and Wil Cordero. Pitcher T.J. Tucker reached on a bunt single, setting the stage for Vidro.

After extending his hitting streak to 19 games earlier in the game, Vidro wasted no time ending it. He sent a hanging slider from Mercado over the left field wall for his fourth homer of the season and second career slam.

"When I went to the plate I tried to calm down," Vidro said. "I was thinking don't try to get too big. Actually, it's tough when you go out there and try to hit a home run. It doesn't happen. Sometimes you try to calm yourself down and things like that happen."

In eight innings this season, Mercado has been shelled for 14 runs and 16 hits.

Tucker (3-0) gave up a run in two innings for the win.

"If you want to call it crazy or whatever, it was a nice win," Expos manager Frank Robinson said. "That's the way I look at it, we came out a winner. It wasn't pretty but we won. We just stayed tough. I don't know what it is with this ballclub. When their backs are against the wall, that's when they respond."

Jeremy Giambi, acquired earlier this week from Oakland, homered in his first two at-bats for the Phillies.

First baseman Travis Lee, whose job could be in jeopardy with the addition of Giambi, delivered an RBI double in the eighth, giving Philadelphia an 8-5 lead.

But the Phillies' bullpen, which has been awful, could not hold the lead.

In the eighth, Cordero ripped a two-run double off Bottalico and the tying run scored on an error by left fielder Pat Burrell.

The Phillies recovered from blowing that lead, taking a 9-8 lead in the ninth on a single by Tomas Perez off Tucker.

But Mesa endured his third blown save in the bottom of the inning, giving up singles to Vidro and Vladimir Guerrero that put runners on the corners. Troy O'Leary followed with a single to tie it.

Orlando Cabrera sacrificed but Mesa worked out of it, striking out Fernando Tatis and getting Michael Barrett on a grounder to second, where Perez ranged up the middle before throwing off balance.

Giambi got his tenure in Philadelphia off to a great start, hitting a two-run homer in the second off Carl Pavano.

But the Expos rallied in the bottom of the inning against David Coggin. Brad Wilkerson had a two-run double and Pavano and Jose Macias each had RBI singles. A wild pitch by Coggin in the third made it 5-2.

Giambi started the fourth by hitting his second homer, and the Phillies tied the contest later in the inning on errors by Cabrera and Vidro.

Burrell slugged his 13th homer in the fifth, giving the Phillies a 7-5 lead.