MINNEAPOLIS -- The normally unflappable Ryan Cook had his worst outing of the season for the Oakland A's on Monday, allowing a pair of runs in the eighth inning as the Minnesota Twins rallied for a 5-4 win on Memorial Day.
Cook (1-1), who had not allowed an earned run this season in 21 appearances, gave up an infield single to Joe Mauer, walked Josh Willingham, then allowed a bloop double to Justin Morneau as the Twins snapped a five-game losing streak.
"I guess you're going to give up runs in this game. It's not a secret to anybody," said a subdued Cook, who had pitched 23 consecutive scoreless innings. "It's just unfortunate that I gave them up today. I just didn't get a break."
The A's have now lost six in a row -- their worst slump of the season.
Alex Burnett (2-0) pitched the Twins out of a one-out jam in the top of the eighth for the win.
After blowing a save in a 4-3 loss to Detroit on Sunday, Matt Capps pitched the ninth for his 10th save. He struck out Jonny Gomes with the bases loaded to end the game.
"Whether you're up by one or up by three or up by 10, you want to get back on the mound and try to erase the day before as quickly as possible," Capps said. "No matter what we say, 'We come in here, we forget about it,' until you go out there that next time and get a job done, it still lingers a little bit. So it feels good to go out there and get a win for us."
Oakland jumped out to a 2-0 lead when Josh Reddick and Kila Ka'aihue both hit two-out solo homers to right, in the first and second innings, respectively.
The A's seemed likely to pad their lead in the fifth when Collin Cowgill reached on an infield single, and Adam Rosales was safe when Trevor Plouffe bobbled a hard grounder to third. Both runners advanced on a wild pitch. But with men on second and third and one out, Jemile Weeks hit a bouncer to second. Twins second baseman Alexi Casilla threw home, and Mauer was able to chase down Cowgill on the basepath, preventing a run from scoring.
"We had a couple opportunities where we could've added on without a hit, and I think those end up biting you a little bit, especially in a close game like that," Oakland manager Bob Melvin said.
Plouffe made up for the error in the bottom of the fifth, sending a homer into the third row in left-center field. It was his fifth homer run of the season, and pulled the Twins within a run at 2-1.
Oakland answered almost immediately, as Reddick led off the top of the sixth with a triple off the wall in right-center, then came in to score when Brandon Inge hit into a 4-6-3 double play.
Lefty Travis Blackley was making his first start for the A's after being claimed off waivers from the Giants on May 15. He went five innings and allowed just three hits. Jordan Norberto came in to pitch the sixth for Oakland and ran into immediate trouble. He walked DarinMastroianni and Mauer, allowed a run-scoring double to Willingham, and Minnesota tied the game at 3-3 when Morneau's sacrifice fly scored Mauer from third.
"We didn't kill the ball, but we got enough hits and enough runs to get a win," said Twins manager Ron Gardenhire. "(Scott) Diamond threw the ball good, he battled through some things. He wasn't perfect, but he battled and got us deep into the game, which was good for us.
"Our bullpen was really thin, we weren't going to use any lefties. We did the best we could with Gray and (Burnett) and Cappie there at the end made it entertaining."
Diamond started for Minnesota and pitched into the seventh inning.
Notes: Twins general manager Terry Ryan announced that pitcher Jason Marquis has cleared release waivers and is a free agent. Minnesota signed the right-hander in the off-season after Marquis had spent 2011 with Washington and Arizona. He was 2-4 with a 8.47 ERA for the Twins. ... The homers by Reddick and Ka'aihue marked the first time two different left-handed hitters for Oakland cleared the fence versus a lefty starter since July 1, 2007. On that day, Dan Johnson and Jack Cust homered off Andy Pettitte ... Target Field is the best place in the majors to see teams turn two. After Monday's game the Twins have hit into a MLB-leading 53 double plays and have turned a MLB-leading 69 double plays. They turned four on Monday. ... Inge was 0-for-2 with a walk and was hit by a pitch in his first appearance for the A's since returning from the disabled list. He was placed on the DL earlier in the month with a strained right groin. In a two-game rehab stint with Oakland's AAA affiliate in Sacramento, Inge went 6-for-7 with eight RBI. "He fit in very quickly in a short amount of time and it's nice to get him back," Melvin said. "You just feel better about your lineup when you have a guy like him playing for you."