Washington (22-15) at San Francisco (25-11)

Damian Moss looks to become the National League’s first six-game winner as the San Francisco Giants open up a three-game series against the Montreal Expos at Pac Bell Park.

Moss has been a revelation for the Giants with a 5-0 record and stellar 2.55 ERA in seven starts.

The Australian born pitcher was acquired from Atlanta in the offseason in a trade that sent pitcher Russ Ortiz to the Braves. Ortiz has done well for the Braves, going 4-2, but he hasn’t matched the output of Moss.

Moss hasn’t allowed more than three earned runs in any of his seven starts. The left-hander has held the opposition to one run or less in three straight outings.

Despite a flawless record, Moss has only one win in three starts at Pac Bell Park, despite having a 2.55 ERA.

The Giants are hoping Moss can help end their two-game losing streak.

Atlanta catcher Javy Lopez hit a three-run homer to lead the Braves over San Francisco 7-3 on Sunday.

The Giants, who beat the Braves in the first round of the playoffs last season, have lost two in a row following a six-game winning streak. Neifi Perez had four hits for San Francisco.

Montreal lost two of three over the weekend to the Los Angeles Dodgers at Olympic Stadium.

The Expos, who had four-run comebacks in the seventh inning in each of the first two games of the series, fell short in their latest attempt, losing 4-3 to the Dodgers on Sunday.

Montreal outfielder Vladimir Guerrero and third baseman Fernando Tatis did not play.

“They had the flu,” manager Frank Robinson said. “I hope they don’t infect anybody else.”

STANDINGS: Expos - 2nd place, 3 GB, NL East. Giants - 1st place, NL West.

EXPOS PROBABLE STARTER: Zach Day (3-1, 2.89 ERA). Day is coming of his worst outing of the season. In five inning of work, he allowed a season-high six earned runs but did not qualify for a decision after the Expos hitters bailed him out with a 12-9 win over San Diego on Wednesday. The 24-year-old right-hander had given up only nine earned runs total in his previous six starts.

GIANTS PROBABLE STARTER: Moss (5-0, 2.11 ERA). Moss is 2-2 with a 5.26 ERA in four career starts against Montreal. The 26-year-old held the Florida Marlins to one run and five hits to earn a 3-2 win on Wednesday.

OFFENSIVE LEADERS: Expos - Jose Vidro, .341 avg.; Orlando Cabrera and Guerrero, 6 HRs; Brad Wilkerson, 27 RBIs; Guerrero, 25 runs; Guerrero and Endy Chavez, 4 SBs. Giants - Jose Cruz, .313 avg., 24 RBIs and 30 runs; Barry Bonds, 10 HRs; Ray Durham, 5 SBs.

2002 SEASON SERIES: Expos, 4-2.

STREAKS AND NOTES: Expos - 3B Tatis is 2-for-8 with two home runs and five RBIs in his career against Moss. … 2B Vidro went hitless in four at bats Sunday to snap a seven-game hitting streak. He is batting .394 (13-for-33) with six runs scored over the last eight games. … OF Guerrero has a career batting average of .340 in 50 games against San Francisco. Giants - LHP Moss’s ranks fifth in the majors with a 2.11 ERA. … OF Bonds has hit 55 of his 623 career home runs against Montreal. Only San Diego (72) and Philadelphia (56) have yielded more homers to Bonds. … 3B Edgardo Alfonso is batting .181 (2-for-11) with one extra base hit over the last four games. Alfonso is a career .296 hitter in May.

ROAD/HOME RECORDS: Expos - 8-7 on the road; Giants - 10-5 at home.

INJURIES: Expos - RHP Tony Armas Jr. (rotator cuff), 15-day DL; RHP Orlando Hernandez (14-for-31), 15-day DL. Giants - OF Marvin Benard (knee), 15-day DL; LHP Jason Christiansen (elbow), 15-day DL; RHP Robb Nen (shoulder), 15-day DL.