Boston's league-best defense -- performing better than any Red Sox fielders in 56 seasons to date -- betrayed Gabbard and reliever Julian Tavarez in the decisive sixth and seventh innings.
Boston's five-game winning streak was snapped.
Athletics 9, Tigers 5
In Detroit, Mark Kotsay's three-run homer in the second inning helped Oakland erase a five-run deficit, then Milton Bradley and Marco Scutaro each added homers to give the Athletics a win over the Tigers.
Yankees 5, Blue Jays 4
In Toronto, Bernie Williams homered, Derek Jeter drove in the go-ahead run with a bases-loaded walk, and the Yankees ended a three-game losing streak with a victory over the Blue Jays.
Angels 4, Royals 3, 10 innings
At Kansas City, Missouri, rookie Reggie Willits singled home the go-ahead run in the 10th inning as Los Angeles snapped a three-game losing streak with a victory over Kansas City.
Indians 11, Twins 0
At Cleveland, rookie Jeremy Sowers shut down the hottest-hitting team in baseball on four hits, and Cleveland snapped Minnesota's eight-game winning streak.
Rangers 3, White Sox 1
At Chicago, Michael Young hit a tiebreaking, two-run single in the ninth inning, and Texas beat the slumping Chicago.
Devil Rays 13, Orioles 12
At St Petersburg, Florida, Julio Lugo homered twice during a 10-run fifth inning, helping Tampa Bay build a big enough cushion to hold off Baltimore.
National League
Xavier Nady hit a three-run homer and Orlando Hernandez recovered from a shaky start to pitch the New York Mets past the Houston Astros 4-3 on Saturday.
Carlos Delgado added a sacrifice fly, helping the Major League Baseball National League East-leading Mets to their third consecutive victory and 11th in 15 games. They improved to a season-best 21 games over .500.
Nationals 7, Cubs 3
In Washington, Alfonso Soriano hit three doubles and a triple, drove in one run and scored two, while Livan Hernandez threw six solid innings for his first win in nearly a month as the Nationals won two straight for the first time in three weeks.
Marlins 5, Pirates 0
In Miami, Ricky Nolasco allowed four hits in 7 1-3 innings and struck out seven, leading the Florida Marlins over the Pirates.
Reds 8, Brewers 7
In Cincinnati, Ryan Freel hit a pair of solo homers, including a tiebreaking shot in the eighth inning that sent Cincinnati over Milwaukee in front of a rare capacity crowd at Great American Ball Park.
Marlins 5, Pirates 0
At Miami, rookie Ricky Nolasco allowed four hits in 7 1-3 innings and struck out seven, leading Florida over Pittsburgh.
Giants 4, Padres 3
At San Francisco, Jason Schmidt (7-6) won for the first time in more than six weeks, and San Francisco took first place in the NL West with its season-best fifth straight win.
Diamondbacks 4, Rockies 3
At Phoenix, Luis Gonzalez's solo home run in the eighth inning off Jose Mesa (0-4) lifted Arizona over Colorado for its 10th win in 12 games and within a half-game of the NL West lead.
Cardinals 6, Dodgers 1
At Los Angeles, Jim Edmonds homered for the fourth time in five games, Albert Pujols added a two-run shot and St Louis beat Los Angeles to tie the longest home run streak in franchise history at 18 games.
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