NEW YORK (AP) -Joba Chamberlain bounced back from a disappointing first start with the Yankees, pitching into the fifth inning to help New York beat the Kansas City Royals 6-3 Sunday.

Jason Giambi hit a tiebreaking homer in the sixth and Bobby Abreu finished with a home run and three RBIs for the Yankees, who have won four of five. Johnny Damon got two more hits after going 6-for-6 with the game-winning single in New York's 12-11 comeback victory Saturday.

Jose Guillen hit a two-run homer and Joey Gathright made three outstanding plays in center field for Kansas City, which has lost 17 of 20.

Working under a strict pitch count as he transitions from the bullpen to the rotation, Chamberlain threw 78 pitches on a 95-degree afternoon. He allowed three runs - two earned - and five hits in 4 1-3 innings, striking out five and walking one.

Dan Giese (1-1) replaced Chamberlain and pitched 2 2-3 hitless innings for his first major league win. Mariano Rivera tossed a perfect ninth for his 16th save.Red Sox 2, Mariners 1

BOSTON (AP) - Justin Masterson pitched six strong innings and J.D. Drew hit a go-ahead homer for Boston, lifting the Red Sox over the Seattle Mariners.

Masterson (3-0) gave up one run on three hits and struck out four for Boston, which has won 15 of its last 16 at home and eight of 10 overall. Jonathan Papelbon pitched a perfect ninth for his 18th save.

Drew greeted Seattle reliever Sean Green (1-2) with his eighth homer of the season in the sixth inning to break a 1-1 tie. It was only the second homer allowed by Green, who made his 32nd appearance, tied for first in the American League.Blue Jays 5, Orioles 4

TORONTO (AP) - Roy Halladay won his fourth straight start, Vernon Wells homered and the Toronto Blue Jays snapped a four-game losing streak.

Marco Scutaro drove in two runs for Toronto, which avoided a three-game sweep.

Luke Scott hit two homers for the Orioles, a solo shot in the second inning and a two-run drive in the sixth. It was the third multihomer game of his career.

Halladay (8-5) allowed four runs and eight hits in 7 2-3 innings and has not lost since May 9 at Cleveland, a span of six starts. B.J. Ryan worked the ninth for his 13th save.

Trailing 4-2, the Blue Jays scored three times in the sixth against reliever Matt Albers (3-2).White Sox 12, Twins 2

CHICAGO (AP) - Nick Swisher and Alexei Ramirez homered as the Chicago White Sox routed the Minnesota Twins for their sixth straight win.

The latest outburst came exactly one week after manager Ozzie Guillen lashed out at his struggling hitters. They responded with 54 runs during this streak, and have scored 10 or more in three consecutive games for the first time since July 15-17, 2000, against St. Louis and Milwaukee.

Swisher's three-run homer off Kevin Slowey (2-6) in the second made it 3-1 and Chicago broke it open with five more in the third.

Gavin Floyd (7-3) struck out a career-high nine and walked one while allowing two runs and six hits in seven innings.Tigers 5, Indians 2

DETROIT (AP) - Curtis Granderson homered and Placido Polanco hit a key two-run single as the Detroit Tigers beat the Cleveland Indians.

Armando Galarraga (5-2) picked up the win, allowing two runs in 5 2-3 innings. Todd Jones pitching the ninth for his 10th save.

Jeremy Sowers (0-1) took the loss, giving up five runs on seven hits and two walks in four innings.Copyright © 2005 The Associated Press. All rights reserved. The information contained in the AP News report may not be published, broadcast, rewritten or redistributed without the prior written authority of The Associated Press.