OAKLAND, Calif. -- Marco Scutaro was considered the odd man out to make Oakland's roster at the end of spring training.
He's been far from expendable since then.
"You've got to be aggressive there, but you don't want to swing at a bad pitch," said Scutaro, released by the Mets after the 2003 season. "I was looking for a fastball."
Justin Duchscherer (3-1) pitched two innings for the win as the A's won their third straight and eighth game in June to surpass their entire May win total of seven.
Pinch-hitter Bobby Kielty drew a 3-2 walk from Royce Ring (0-1) to lead off the ninth, then Roberto Hernandez entered to face Keith Ginter. Ginter's sacrifice bunt advanced Kielty, and pinch-hitter Scott Hatteberg was intentionally walked to bring up Nick Swisher.
Swisher struck out, but Scutaro came up with the big hit on the first pitch he saw to score Kielty.
Scutaro also had the winning hit April 27 against Chicago, and the winning sacrifice bunt April 16 on which the pitcher committed a throwing error.
Scutaro's reliable defense in the infield also has been key for the A's, who were without reigning AL rookie of the year Bobby Crosby for nearly two months early in the year as he recovered from two fractured ribs.
Still, Scutaro keeps preparing himself to be sent down. That seems unlikely now.
"He's been a clutch hitter for us," manager Ken Macha said. "When the game's on the line, you can rip the first pitch."
The Mets lost for the sixth time in seven games, and they have failed to score more than three runs in any of those losses. They lost 5-0 in the opener Tuesday night.
Crosby blooped a single into shallow left field in the sixth to break a scoreless tie, and Eric Chavez -- the designated hitter for the second straight day as he nurses a sore throwing shoulder -- followed with an RBI triple.
But starter Dan Haren couldn't hold the lead, and he missed a shot at his fourth straight win.
He gave up back-to-back doubles to David Wright and Doug Mientkiewicz in the seventh, then a tying sacrifice fly to Jose Reyes to tie it at 2.
"It was good to see they scored two and we answered right back," Mientkiewicz said. "Those little things you build on as an offense. It stinks to lose, but we have to take a positive out of it."
Haren and Victor Zambrano engaged in an impressive pitcher's duel for seven innings, but neither had anything to show for it.
Haren calmly worked out of a bases-loaded jam in the second, getting Victor Diaz to ground out to end the threat. Haren had only allowed two walks over his last four starts.
After Kaz Matsui singled in the third, Haren retired the next 10 batters before Cliff Floyd's two-out single in the sixth. Haren then plunked Mike Piazza in the back of the left shoulder.
The right-hander allowed five hits and two runs in seven innings, struck out eight and walked two.
Zambrano was equally as sharp, giving up two runs and five hits in 7 2/3 innings.
He retired 17 of his first 19 batters, allowing a second-inning walk to Ginter followed by a double from Eric Byrnes. After that, he got 12 straight outs before Crosby's single in the sixth.
Diaz made a terrific catch in right field in the fifth to rob Byrnes of an extra-base hit. Diaz sprinted toward the wall and backhanded the ball just before brushing up against the fence.
Mets manager Willie Randolph waited to write the lineup until outfielder Mike Cameron had gone through work on the field to test his strained right quadriceps muscle and swollen knee.
Cameron, who dislocated his left ring finger in Sunday's game against the Angels, wore two patches on the leg over night to decrease the swelling but he was still given another day to recover.
Crosby batted third for the first time this season and the second time in his career. He entered as a defensive replacement for Miguel Tejada in the sixth inning of a 7-4 loss at Seattle on Sept. 27, 2003. ... The Mets placed 2B Miguel Cairo on the 15-day disabled list before the game with a strained left hamstring and called up 1B-OF Brian Daubach from Triple-A Norfolk. ... A's DH Erubiel Durazo, on the DL with tendinitis in his left elbow, will fly to Los Angeles on Thursday to be examined by Angels' team doctor Lewis Yocum. ... Oakland No. 2 starter Rich Harden, nursing a strained stomach muscle, will pitch for Triple-A Sacramento on Friday for a rehab assignment.