SEATTLE (AP) – Jason Giambi’s second straight big game powered the New York Yankees to another come-from-behind victory.

Giambi hit two homers and drove in four runs as the Yankees rallied from a four-run deficit and beat the Seattle Mariners 7-4 Monday night for their fifth straight win.

On Sunday, Giambi had two homers and seven RBIs in a 10-3 victory over Kansas City at Yankee Stadium.

In this one, Mike Mussina had his second straight poor outing, and the Yankees needed Giambi’s power as they won after trailing by four runs for the second time in three games, the eighth time this season.

Starting a seven-game trip following a 6-1 homestand, New York remained 11/2 games behind AL East-leading Boston and opened a one-game lead in the AL wild-card race. The Yankees, a season-high 18 games over .500 at 74-56, have won six of seven this season against the Mariners, who are last in the AL West.

Giambi had a 432-foot homer to right off the Hit It Here Cafe in the fifth to pull the Yankees to 4-1, and Robinson Cano had an RBI single later in the inning.

After starter Ryan Franklin walked Gary Sheffield and Alex Rodriguez with one out in the sixth, Mariners manager Mike Hargrove brought in left-hander Matt Thornton (0-4) to face Giambi, who hit a three-run homer down the right-field line.

Following a long August slump, Giambi had a cortisone shot in his left elbow last Thursday. He is the first Yankees player to have consecutive multihomer games twice in one season, the first in major leaguer since San Francisco’s Barry Bonds on July 30-31 and Aug. 30-31, 1999. Giambi has 25 homers and 64 RBIs on the season.

Former-Mariner Alex Rodriguez hit his league-leading 39th homer off Julio Mateo in the eighth and Matt Lawton, acquired Saturday from the Chicago Cubs, added his first homer for the Yankees, a drive off George Sherrill.

Aaron Small (5-0), who replaced Mussina with the bases loaded and nobody out in the fourth, got the win in his fifth relief appearance of the season, allowing one hit in four scoreless innings.

Mussina, who gave up eight runs in an inning against Toronto last week, allowed four runs and six hits in three-plus innings, tying his season high with four walks. He was 1-2 with an 8.17 ERA in five August starts, leaving his season ERA at 4.34.

Ichiro Suzuki put the Mariners ahead when he homered on the second pitch of the game. Suzkui has five leadoff homers this season and 17 in his career. He also has a career-high 14 homers this season.

Mussina walked Richie Sexson with the bases loaded in the third – throwing eight straight balls to Raul Ibanez and Sexson. After Small relieved, Suzuki and Willie Bloomquist hit RBI grounders.

Mariano Rivera pitched the ninth for his 34th save in 38 chances.

Franklin went 5 1-3 innings, giving up four runs, four hits and four walks in 5 1-3 innings.

Notes: Giambi had his seventh multihomer game of the season and 30th of his career. He had consecutive multihomer games on July 20-21. … Suzuki’s previous high was 13 homers in 2003. The five-time All-Star has 51 homers in his Mariners’ career. … Mariners rookie Yuniesky Betancourt got his first major league stolen base in his 28 games. … Bloomquist left the game in the fourth with a strained left hamstring after running hard to beat out the throw at first on his RBI grounder.

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