SAN FRANCISCO — The San Francisco Giants pinned their hopes on Jake Peavy to provide new life to a beat-up rotation and a lineup searching for a lift.

It was a disappointing debut for the right-hander a day after being traded by the Boston Red Sox, and he dropped his 10th straight decision in a 4-3 defeat to the Dodgers that sent the rivals back to Los Angeles with a sweep and the NL West lead.

Still searching for runs, the Giants were outscored 17-4 and lost for the 19th time in their last 25 home games. They have lost four straight overall.

“It’s going to be important to put it behind us,” manager Bruce Bochy said. “We have to regroup.”

Carl Crawford hit an RBI triple to back Hyun-Jin Ryu’s third straight victory as the Dodgers grabbed momentum in the division as August approaches.

Ryu (12-5) moved within two wins of his rookie total last year and improved to 4-1 in five outings at AT&T Park, where in one dominant weekend the Dodgers made quite a statement to take over the NL West’s top spot.

“You make enough of a statement by winning three games,” manager Don Mattingly said. “Obviously it’s something. That’s all it is at that point because you have a lot of baseball to play. We’re going to see these guys again. They’re not going anywhere.”

Peavy threw a pair of wild pitches in the fifth as the Dodgers went ahead on Hanley Ramirez’s RBI single ahead of Crawford’s triple to the corner in deep right field.

“I was comfortable tonight. I’ve played against the Dodgers quite a few times and I’ve played in this ballpark,” Peavy said. “It was fun being on the right side. I just hate the way it turned out. I think I can get much better. I expect to get much better.”

Again, Peavy suffered from a lack of run support, getting three or fewer runs of support for the 11th straight outing.

San Francisco was swept in the rivalry for the first time since June 24-26, 2013, at Dodger Stadium. The last Dodgers sweep at AT&T Park came July 27-29, 2012.

“It was great. To come out of here with a 1 1/2-game lead, especially coming into it with a 1 1/2-game deficit, obviously best-case scenario,” first baseman Adrian Gonzalez said.

Buster Posey hit a solo home run in the fifth for San Francisco’s first extra-base hit since Hunter Pence doubled in the ninth inning Wednesday at Philadelphia ”“ the Giants’ first three-game stretch without an extra-base hit since May 30-June 1, 2002.

Ryu struck out seven in six innings and improved to 8-2 in 11 road starts. Kenley Jansen followed scoreless innings by J.P. Howell and Brian Wilson for his 30th save.

Peavy (0-1) pitched a day after being traded from the Boston Red Sox to the Giants for a pair of minor league pitchers, reuniting him with former manager Bruce Bochy. Peavy pitched for Bochy and the Padres in the playoffs in 2005-06.

That understanding sure helps.

Bochy stuck with the right-hander to get through the sixth after he allowed a leadoff walk to Juan Uribe. Peavy drew regular roars from a lively sellout crowd at AT&T Park as fans found plenty to cheer for after a frustrating few days.

“I am high strung out there and that’s something I really can’t change,” Peavy said. “I’m going to give you everything I’ve got. I can’t let my emotions get the better of me.”

He allowed six hits and four runs ”“ three earned ”“ struck out five and walked two in six innings.

Peavy dropped to 14-3 with a 2.28 ERA in 26 starts against Los Angeles, including a three-hitter last Aug. 25 at Dodger Stadium in which he struck out five and walked one.

Second baseman Dan Uggla committed two errors, including one that helped tie it early after he scored the game’s first run in the bottom of the third. Uggla’s fielding error leading off the top of the fourth allowed Ramirez to reach and Uribe later singled in the tying run.

“It’s a tough game sometimes,” Bochy said. “You’re going to make errors.”

BLUE JAYS 5, YANKEES 4

NEW YORK (AP) — Dioner Navarro hit a go-ahead single with two outs in the ninth, and Toronto rallied after wasting three leads for its first series win in the Bronx since Aug. 27-29, 2012.

After snapping a 17-game skid at Yankee Stadium on Saturday, Toronto did not relent in the humidity. Jose Bautista reached on a fielder’s choice against David Robertson (1-3) in the ninth, stole second without a throw and scored on Navarro’s liner to center field.

Aaron Sanchez (1-0) gave up Carlos Beltran’s tying RBI hit in the eighth. Munenori Kawasaki had put Toronto ahead with a sacrifice fly that followed Dellin Betances’ two-base error on a pickoff attempt.

ATHLETICS 9, RANGERS 3

ARLINGTON, Texas (AP) — John Jaso drove in three runs, helping Scott Kazmir and Oakland beat Texas.

Jaso had a run-scoring single during the Athletics’ five-run second inning and added a two-run double in the fifth. Oakland’s first three batters ”“ Jaso, Stephen Vogt and Yoenis Cespedes ”“ each had a double and a single, and Josh Reddick added three singles.

Kazmir (12-3) moved into a tie for the American League lead while allowing seven hits in five innings. He walked two and struck out two.

Adam Rosales had a two-run homer in the second for Texas, and Adrian Beltre added a solo shot off reliever Evan Scribner in the eighth.

Miles Mikolas (1-3) allowed seven earned runs on seven hits and four walks in 4 2-3 innings.

MARLINS 4, ASTROS 2

HOUSTON (AP) — Garrett Jones and Marcell Ozuna homered for Miami, which completed a three game sweep. Houston has lost five in a row and eight of 10.

Jones’ homer capped a three-run first for the Marlins, and Ozuna padded the lead with his solo shot in the sixth. Miami has won seven of eight following a six-game skid.

Jacob Turner (4-6) allowed one run and six hits in 5 2-3 innings, and Steve Cishek allowed one run in the ninth before getting his 26th save.

Collin McHugh (4-9) gave up four runs and seven hits 6 1-3 innings with nine strikeouts.

TWINS 4, WHITE SOX 3

MINNEAPOLIS (AP) — Sam Fuld hit a tiebreaking, two-run single off Javy Guerra in a three-run seventh inning, and Minnesota avoided a four-game sweep.

Danny Santana had two RBIs for the last-place Twins, who won for just the 11th time in their last 30 games.

Chicago led 2-1 in the seventh when Minnesota loaded the bases against Ronald Belisario (3-7).

Jared Burton (2-2) pitched a scoreless inning, and Glen Perkins retired Gordon Beckham on a bases-loaded flyout for his 25th save.

INDIANS 10, ROYALS 3

KANSAS CITY, Mo. (AP) — Carlos Santana hit a pair of two-run homers, giving him six homers in six games. Cleveland ended Kansas City’s winning streak at five.

Ryan Raburn and Yan Gomes also homered for the Indians, who stopped their four-game losing streak and ended Kansas City’s five-game winning streak.

Danny Salazar (3-4) gave up three runs and seven hits over seven innings. Bruce Chen (2-3) allowed up six runs and eight hits in five-plus innings.

ANGELS 2, TIGERS 1

ANAHEIM, Calif. (AP) — David Freese hit a tiebreaking homer off Joba Chamberlain (1-4) in the eighth inning, and Los Angeles won its third straight.

Erick Aybar scored from second base on Rick Porcello’s poor pickoff throw in the fifth for the Angels, who improved the majors’ second-best record to 63-41 in the finale of a 10-game homestand.

Hector Santiago and three relievers combined on a three-hitter. Joe Smith (4-0) pitched the eighth, and Huston Street finished for his third save since he was acquired from San Diego.

Victor Martinez had an RBI double in the first for the Tigers, who have lost nine of 10 at the Big A.

ORIOLES 3, MARINERS 2

SEATTLE (AP) — Manny Machado lifted a bases-loaded sacrifice fly in the 10th off Yoervis Medina (4-2), who was pitching on his 26th birthday. Adam Jones had led off with a double, and Nelson Cruz and Chris Davis walked.

Baltimore took three of four in the series, twice winning in extra innings. T.J. McFarland (4-2) worked one inning for the victory, and Zach Britton struck out the side in the 10th for his 20th save.