MILWAUKEE -- Matt Koch pitched well enough to win. Thanks to the D-backs' suddenly punchless offense and poor baserunning, he didn't.
Domingo Santana lofted a sacrifice fly off reliever Jorge De La Rosa in the sixth inning to give Milwaukee a 1-0 victory on Tuesday night at Miller Park, the D-backs' sixth consecutive loss and 12th in the last 13 games.
The D-backs, who have scored just 24 runs in the last 13 games, were held to three hits for the second consecutive night. They drew seven walks, but offset them with four runners thrown out on the bases.
"We had some opportunities, but we just couldn't capitalize," manager Torey Lovullo said. "Everybody's frustrated here. We're in a situation where the offense hasn't been stepping up the way we know they're capable of. I believe in these guys and I think they're going to eventually turn it around."
Koch allowed just two singles until Ji-Man Choi doubled to open the sixth. Lorenzo Cain walked and both runners advanced on Travis Shaw's slow groundout to short. De La Rosa relieved and Santana sent the first pitch to left deep enough to score Choi from third, saddling Koch with the loss.

"I knew he throws a lot of splits with runners in scoring position, so I was just trying to get anything up so I could drive the ball in the air," Santana said. "I'm just glad I saw the split and I put a pretty good split on it. I got it done."
In his previous start, Koch was tagged for eight runs on nine hits in 4 1/3 innings in an 8-2 loss to the Brewers. "The command was a lot better today," said Koch who struck out five and walked three in 5 1/3 innings. "Changeup was pretty good, I was able to get the curveball when I needed and the cutter when I needed."
Arizona managed just two hits off Brewers starter Jhoulys Chacin in five innings. The D-backs had a single and three walks off the bullpen, but couldn't score. The Milwaukee 'pen entered Tuesday with a Major League-best 2.58 ERA.
The D-backs squandered an opportunity in the first when Jake Lamb doubled with two outs and Paul Goldschmidt walked, but Daniel Descalso popped to third.
The baserunning blunders were the result of guys probably trying too hard, Lovullo said.

"These guys are revved up, ready to go, trying to make something happen, and forcing some issues that just aren't there," Lovullo said. "I believe we have to be aggressive on the bases, but we've got to be smart aggressive and not run into those types of outs."
Ketel Marte singled to left-center to open the second, but was thrown out by center fielder Cain trying to stretch it into a double.
Marte was caught again in the seventh after drawing a one-out walk. Pinch-hitter John Ryan Murphy sent a sinking liner to shallow center, but Cain made a sliding grab and easily doubled up Marte, who had already rounded second.

Jarrod Dyson walked to open the eighth, but was thrown out attempting to steal when he slid past the bag. Dyson, with 212 career steals, had been successful on eight of his first nine attempts.
Lamb walked to open the ninth, but pinch-runner Nick Ahmed was caught stealing.

Although Tuesday marked the first time the D-backs have been shut out in their past 13 games, they have scored one run five times and two runs on four occasions during that stretch, including the lone victory, a 2-1 win over the Brewers at home on May 15.
"The games we've been losing, they haven't been blown-out games," Dyson said. "We're right there. We're just one hit away from either tying it or winning it. We just haven't been getting the big hit."
SOUND SMART
The D-backs have dropped 12 of 13 since being a season-high 13 games over .500 on May 8. The 1-12 stretch is the worst since they also lost 12 of 13 in June 2006.
DYSON ROBS SANTANA OF THREE-RUN SHOT
Dyson took a three-run homer away from Santana with a leaping catch above the wall in center to end the fourth inning. With the score tied 0-0, Cain singled to left with two outs for the Brewers first hit of the game off Koch, and Shaw walked. Santana, who had one of the Brewers three homers in Monday's 4-2 victory, ripped the first pitch to deep center, but the speedy Dyson timed his leap perfectly, and made the grab with his glove above the wall.

"Actually I thought it was like just a routine pop-up. I kind of came in and I realized that ball was hit farther than what it looked. I just went back and tried to make a play on it and was able to grab it," Dyson said. "Anytime I'm out there, I'm just trying to make plays to save my pitcher from throwing another pitch."
UP NEXT
Right-hander Zack Godley (4-3, 3.78) starts the series finale at 10:10 a.m. MST on Wednesday at Miller Park. Godley was 4-1 with a 3.81 ERA in five starts in April, but is 0-2 in four starts in May, despite a 3.75 ERA for the month. He is 2-0 with a 1.42 ERA in four games -- three starts -- against the Brewers.