Oakland's Shannon Stewart hit a tiebreaking two-run single in the 10th against a makeshift San Francisco defense to lift the Athletics to a 5-3 victory on Friday.
Giants manager Bruce Bochy, out of position players on the bench, was forced to use left-hander Noah Lowry in the outfield after a collision at the plate in the 10th forced backup catcher Eliezer Alfonzo out of the game with a leg injury.
Feliz moved from third to catcher to make his major league debut behind the plate.
Stewart singled to left off Brad Hennessey (1-2).
Kiko Calero (1-4) got two outs in the ninth with the bases loaded for the win.
It was the first career appearance for Lowry at any fielding position other than pitcher. The last pitcher to play in the field was Jason Simontacchi of St. Louis when he played in left field in the ninth inning against Arizona on April 10, 2004, according to the Elias Sports Bureau.
Rookie Travis Buck had a career-high four hits, including two doubles, and drove in two runs as Oakland's offense bounced back a day after being one-hit by Boston's Curt Schilling.
Mets 3, Tigers 0
At Detroit, David Wright and Carlos Delgado homered and Jorge Sosa won for the sixth time as the New York Mets beat Detroit to snap a four-game losing streak.
Wright hit his 10th homer off Tigers starter Chad Durbin in the fourth inning to make it 1-0. Delgado put New York ahead 2-0 with his 10th homer in the seventh.
Sosa (6-1) scattered four hits over eight innings in his longest outing of the year. He struck out five and walked two.
Billy Wagner pitched a perfect ninth for his 14th save.
Durbin (5-2) gave up three runs and six hits in eight-plus innings. He struck out four and walked one in his longest outing since April 25.
Red Sox 10, Diamondbacks 3
At Phoenix, J.D. Drew hit a pair of three-run homers and drove in a career-high seven runs, and Josh Beckett improved to 9-0 with a five-hitter in Boston's first regular-season visit to Chase Field.
It took Drew six innings to double the number of home runs he hit in his first 50 games since signing a US$70 million, five-year contract with the Red Sox last winter.
Drew's eruption provided plenty of support for Beckett, who matched his season high by going eight innings, allowing two earned runs and five hits without a walk. He struck out eight, also matching a season high.
Beckett has tied the fifth-best start in franchise history, matching Sonny Siebert, who won his first nine decisions in 1971. The best start is Roger Clemens' 14-0 in 1986.
Julio Lugo led off the first by driving a 3-2 pitch from Doug Davis (4-7) 408 feet into the left-field bleachers, drawing a roar from the throngs of Red Sox fans who invaded Chase Field. It was Lugo's second leadoff homer of the season.
Yankees 5, Pirates 4, 10 innings
At New York, Derek Jeter hit a game-winning infield single with the bases loaded in the 10th inning as the New York Yankees extended a winning streak to four for the first time this season.
Robinson Cano doubled to left-center leading off the 10th against Matt Capps (3-3). He was sacrificed to third. Miguel Cairo followed with an infield single. After Cairo went to second on defensive indifference, Johnny Damon was intentionally walked and Jeter hit a slow bouncer that second baseman Freddy Sanchez couldn't come up with.
Chris Duffy hit a two-run, inside-the-park home run, putting the Pirates ahead 4-2 in the seventh when his catchable seventh-inning liner sailed over Melky Cabrera and bounced to the center-field wall.
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