FLUSHING, New York (Ticker) -- New York closer Braden Looper had dominated Brad Wilkerson , until tonight.

Wilkerson's three-run homer off Looper snapped a ninth-inning tie as the Montreal Expos posted a 6-3 victory over the New York Mets .

The Expos will relocate to Washington, D.C. for the 2005 season and will play their final game as Canada's National League entry in the series finale Sunday. The Expos had lost five straight before notching a 4-2 win over the Mets on Friday.

"It could be the last home run in Montreal history," Wilkerson said. "Hopefully it's not, but if it is, it will be a good way to go out."

Brian Schneider reached on an error by second baseman Kaz Matsui to open the ninth before Brendan Harris bunted into a forceout. After pinch hitter Ryan Church worked a one-out walk, Wilkerson sent a 1-2 pitch from Looper (2-5) over the left field wall for his 32nd homer this season.

Wilkerson had just one hit in 14 career at-bats against Looper prior to the decisive opposite field home run.

The error by Matsui, who went several steps to his right before booting the ball, came in just his second game at second base. He has played shortstop throughout his rookie season and will move to second next season.

"I thought it was a tough call," New York center fielder Mike Cameron said of the scoring decision.

Entering with the bases loaded and one out in the eighth, Chad Cordero (7-3) got Cameron to pop out and struck out Victor Diaz to pick up the win.

"They started to get a little momentum, so it was nice to get those guys out," Cordero said.

The Mets had tied the game, 3-3, with a run in the eighth. New York loaded the bases against Luis Ayala before Joey Eischen relieved and induced pinch hitter Gerald Williams to hit a grounder to shortstop Maicer Izturis . Izturis' throw pulled Wilkerson off of first base and allowed the tying run to score. Cordero relieved and ended the threat.

Gary Majewski pitched the ninth for his first major league save.

Montreal starter Livan Hernandez allowed just two runs and six hits in seven innings without walking a batter. He struck out seven in his final start as an Expo.

"Tomorrow will be the last game for us in this uniform," Hernandez said. "It will be something we won't forget. The people in Montreal are beautiful people."

Wilkerson led off the game with one of his two doubles and scored on a two-out single by rookie Terrmel Sledge , who has 23 RBI in his last 21 games.

After Cameron belted his 30th home run in the fifth inning to reduce the Mets deficit to 3-1, Juan Rivera and Val Pascucci answered with solo shots off Al Leiter in the sixth to give the Expos a 3-1 lead. Pascucci's blast to left-center field was estimated at 440 feet.

"I was upset with myself in the sixth. I just got careless," said Leiter, who allowed three runs and seven hits in seven innings.

The Mets cut the lead to 3-2 in the seventh on an RBI single by Diaz.

Expos bench coach Eddie Rodriguez was given the chance to manage the game by manager Frank Robinson and took questions from reporters after the game.