Seven up, seven down for the Cubs starters.

The Cubs rotation has rattled off seven quality starts in a row and beat the first-place Milwaukee Brewers behind a rookie pitcher for the second straight night Wednesday in a 4-2 win in front of 31,191 at Wrigley Field.

Tsuyoshi Wada, the 33-year-old rookie southpaw from Japan, threw 6 2/3 shutout innings before allowing back-to-back homers to Rickie Weeks and Martin Maldonado in the seventh.

Wada — whose night was done after the longballs, allowing the two runs on five hits and a walk while striking out five — picked up his second career victory.

"He's throwing strikes. He's commanding the zone," Cubs manager Rick Renteria said. "He's got a sneaky life to his fastball. He's able to elevate it when he wants. He uses his offspeed pitches very well. He's keeping the ball down.

"He's not missing like he was in the spring. Everything he's doing right now looks like everything he was doing in Triple-A, which is attacking the zone and mixing pitches."