CHICAGO -- Milwaukee right-hander Kyle Lohse wasn't around to benefit, but his six scoreless innings helped the Brewers earn a win Monday night.
The Brewers scored five unanswered runs in the ninth to top the Chicago Cubs 5-0.
Both Lohse and Cubs starter Jeff Samardzija had shutout efforts if no-decisions on a cool Wrigley Field night.
"It was a good ballgame," Brewers manager Ron Roenicke said. "Samardzija pitched well, Kyle pitched really well, and I didn't know if we were going to score.
"But the pitching was outstanding for us."
Carlos Gomez broke the scoreless tie with a run-scoring single in the ninth. His base hit to center scored Jean Segura with what proved to be the game-winner off Pedro Strop (1-1).
The reliever pitched scoreless ball over his first 12 appearances as a Cub, covering 10 2/3 innings, before he was charged with five runs Monday.
"(Strop) made a pretty good pitch to Gomez -- about a foot off the plate and down and away -- and he bloops it in for the big run, and obviously it just snowballed," Cubs manager Dale Sveum said.
Segura, who walked to open the Brewers ninth, sprinted home and easily and beat a throw from center fielder David DeJesus while Jonathan Lucroy advanced to second.
The Brewers then loaded the bases with no outs. Juan Francisco struck out, but Jeff Bianchi hit a double that scored Lucroy and Gomez, marking the end for Strop.
Rickie Weeks made it 5-0 with a bloop hit to the right field corner off Blake Parker that scored Caleb Gindl and Bianchi.
Brewers right-hander Brandon Kintzler (3-0) worked the eighth and earned the victory.
The loss snapped a three-game Chicago winning streak. The Cubs returned to Wrigley Field for the first time in two weeks, beginning a four-games-in-three-days series with the Brewers.
Lohse allowed five hits and struck out six while walking three.
"If I go out there and try and execute as many pitches as I can, the results are going to be good," Lohse said. "Today it was the slider, the slider was working well and we struck with it. Some games it's the changeup, today it was the slider."
Samardzija allowed just three hits, struck out seven and walked two in seven innings.
"I've been feeling great these past few times out and want to keep the momentum going," Samardzija said. "I was pretty happy the way everything went -- kept the walks down, leadoff hitter got out a lot. I felt pretty efficient out there."
However, run support has been sparse of late. The Cubs have managed just seven runs in their past five games.
"You've got to score runs to win, that's the bottom line," Sveum said. "We've got to get the bats going somehow."
Tuesday's day-night doubleheader features the Brewers' Yovani Gallardo (8-9) against the Cubs' Carlos Villanueva (2-7) in the first game, with Jake Arrieta making his Chicago debut in the nightcap against Tyler Thornburg (1-0).
NOTES: When he enters a game, Cubs RHP Eduardo Sanchez will become the 45th player to appear with the team this season, eight shy of the franchise record set in 2012. ... Chicago tops the National League with 337 extra-base hits, though it had just one Monday. The Colorado Rockies are second with 324. ... Samardzija entered Monday as one of only seven pitchers with nine losses despite a sub-.400 ERA. ... Ex-Cubs pitcher Frank Castillo, 44, drowned in a lake near his Arizona home Sunday. He was drafted by the Cubs and played seven seasons in Chicago and also played for five other teams. He had a record of 82-104 with a 4.56 ERA. ... Lucroy has seven home runs in July, the third-best single-month total for a Brewers catcher. He ranks third in the majors in homers this month behind New York Yankees DH Alfonso Soriano (nine) and Texas Rangers 3B Adrian Beltre (eight).