(Sports Network) - If the Chicago Cubs are going to win a third straight National League Central title, they are going to have to pick it up offensively. This weekend would be a good time to get it going, as they return home for the start of a four-game set against the division-leading Milwaukee Brewers that begins tonight.

The Cubs, who last year led the NL with 855 runs scored, have struggled at the plate all season long and especially recently. They were blanked four times in the month of June and managed just one run on three other occasions.

All and all, though, the Cubs are just 3 1/2 games back of the Brewers in the Central race and enter this series on the heels of taking two of three from the Pittsburgh Pirates.

Chicago pulled out a series win on Wednesday, as Derrek Lee belted a two-run home run and Randy Wells tossed seven innings of one-run ball to lead the Cubs to a 4-1 win in the rubber match of a three-game series at PNC Park.

Wells (3-3) gave up six hits and fanned four batters to collect his third straight victory. Kevin Gregg retired the side in the ninth to pick up his 14th save of the year.

Kosuke Fukudome hit a solo homer and doubled, while Geovany Soto went 2-for-4 with a triple and an RBI single for the Cubs, who won for just the third time in their last 10 games.

"I have been trying to go out and throw strikes to keep the flow of the game going. The last three games I have been able to do that," Wells said.

Hoping to keep Chicago in the win column tonight will be Ryan Dempster, who is 4-5 with a 4.09 ERA. Dempster, a 17-game winner a season ago, has just one win in his last eight starts and is winless in his previous five outings.

On Saturday against the White Sox, Dempster did not factor in the decision but was far from effective, as he allowed five runs and eight hits in five innings of the Cubs' 8-7 loss.

Dempster lost to the Brewers the last time he faced them, but is 9-3 lifetime against them with a 2.79 ERA in 37 games (15 starts).

Milwaukee, meanwhile, was denied a sweep in its three-game series with the New York Mets on Wednesday, despite a sensational effort from Yovani Gallardo in the 1-0 loss.

Gallardo (8-5) absorbed the loss despite giving up only one run on five hits in seven innings. He also struck out a career-high 12 and walked two.

"He mixes all his pitches well for strikes," New York's Ryan Church said of Gallardo. "He keeps you off-balance. He keeps you guessing. He really has good control of his curveball and changeup. A lot of people were swinging at the curveball down in the dirt."

Ryan Braun went 2-for-4 for the Brewers, who lost for only the second time in their last six games.

Getting the call for the Brewers tonight will be right-hander Seth McClung, who is 3-1 with a 3.55 ERA this season. After 28 relief appearances, McClung made his first start of the season on Saturday against San Francisco and did not get a decision, as he allowed three runs and six hits in four innings.

This will be McClung's first-ever start versus the Cubs, but he is 1-0 with a 2.55 ERA in 10 trips out of the bullpen against them.

Milwaukee has split its six meetings with the Cubs this season, but won in five of its nine visits to Wrigley a year ago.