Wily Peralta was counted on to be the Milwaukee Brewers' No. 3 starter.

Now, they're not sure if they can count on him at all.

Peralta allowed four runs on five hits and a career-high five walks in five innings as the Brewers lost to the Minnesota Twins 6-3 on Monday.

"He's got a tremendous upside, but he's got to be confident when he's doing this," Brewers manager Ron Roenicke said. "How do you get a guy confident? It comes with success. Right now, he's not that guy."

Peralta (3-6) has lost four consecutive starts and five of his last six. He has allowed 48 runs, most in the major leagues. In his previous start, he lasted just 1 2-3 innings, giving up six runs and seven hits.

"He didn't start off well last year in Triple-A," Roenicke said. "Then he got it. By the time he came up to us, he was really confident. And that's what we expected coming into the season, that we would have that same guy and he's not."

Kevin Correia (5-4) pitched six innings and gave up three solo homers, including two by Carlos Gomez. Glen Perkins pitched a perfect ninth inning for his 10th save.

In the seventh inning, Joe Mauer wound up with a home run instead of a double after umpires went to video replay. It was the second time in three days Mauer was accorded a home run after review.

The Twins, who won for only the second time in 13 games, took advantage of Peralta's wildness in the fifth. Brian Dozier reached on an infield single with one out, Mauer and Justin Morneau walked and Ryan Doumit lined a two-out, two-run single to make it 4-1.

"Free passes always seem to come back and get you," Twins manager Ron Gardenhire said. "He;s got a great arm. The guys were saying the ball really jumps on you. We were patient and made him throw pitches. We kind of nickel-and-dimed him there a little bit and made him pay for a couple of walks."

The Twins led 4-3 when Mauer led off the seventh against Tom Gorzelanny with a long fly to left field. Mauer stopped at second base, and the umpires went to review the drive.

The ball hit the padding atop the fence and then appeared to strike a back wall, making it a home run. The second base umpire was Angel Hernandez — he was the chief in Cleveland earlier this month when Hernandez and his crew mistakenly failed to reverse a call on the field and rule a home run.

"It's funny, that's my second review in three days," said Mauer, who had a home run upheld Saturday in a 3-2 victory over Detroit. "The first time they ruled it a home run originally and the outfielder came in and tried to plead his case that it wasn't. They went back and reviewed it and it was."

"I'm two for two, which is good. But, it's kind of weird to have two home run reviews in three days," he said.

Jean Segura and Gomez hit back-to-back homers to open the sixth.

Chris Parmelee's solo homer in the eighth put the Twins up 6-3.

Gomez, who hit his ninth homer leading off the fourth, raised his average to .331.

"I don't think two months means that he's going to do this for the whole year. But from what I've seen of him, he is definitely a better hitter," Roenicke said. "He has made a lot of improvements on seeing the ball on taking pitches that are down out of the zone. He's made a lot of improvements on hitting the breaking ball. I'd be surprised if this guy did not have a good year."

The Brewers loaded the bases with none out in the first but didn't score. Yuniesky Betancourt lined into a double play and Jeff Bianchi struck out.

NOTES: Alfredo Figaro will start Tuesday against the Twins. He is 0-0 with a 3.46 ERA in 15 appearances, all in relief. Figaro was a starter the last two seasons for Orix in Japan. ... Bianchi bunted for a single, giving the Brewers 64 infield hits, tops in the major leagues. ... Josh Roenicke, nephew of Brewers manager Ron Roenicke, relieved to start the seventh inning for the Twins. Josh Roenicke is the son of former major league outfielder Gary Roenicke. ... Brewers star Ryan Braun, held out of the starting lineup with a sore thumb, pinch-hit in the ninth and lined out to end the game, snapping his 30-game interleague hitting streak.