San Diego's nine-game winning streak is the longest in the NL this season. Even so, it merely pulled the Padres back to .500. They also swept the Reds and Giants on this homestand.
The Cubs, whose offense disappeared during an 0-6 trip, lost their season-high seventh straight and tumbled to .500. It's their longest losing streak since May 2006, when they lost eight straight.
Chicago scored only five runs on its six-game trip through St. Louis and San Diego.
Chris Young (4-2) added to the Cubs' misery by hitting a two-run single and holding them to two runs and four hits in seven innings. The 6-foot-10 right-hander had his first career multi-RBI game and third multi-hit game.
Kouzmanoff tied his career high for four RBIs. He doubled off Ted Lilly (5-4) in the sixth to bring in Adrian Gonzalez, then hit a three-run homer off Aaron Heilman in the seventh, his fourth.
Gonzalez was aboard on an intentional walk after his older brother, Edgar, led off with a pinch-hit double.
Young retired the first 14 batters before Mike Fontenot singled to left-center with two outs in the fifth.
Young came to bat with the bases loaded and one out in the bottom of the inning and hit Lilly's first pitch to left-center to bring in Chase Headley and Drew Macias. Headley singled and Macias doubled before Josh Wilson was walked intentionally to bring up Young.
David Eckstein followed with a suicide squeeze that brought in Wilson for a 3-0 lead.
Young's only mistake came in the seventh, when he allowed Reed Johnson's two-run homer on a high fastball. It was Johnson's first.
Young struck out four and walked none.
Lilly allowed five runs and eight hits in 6 1-3 innings. He struck out four and walked two.
Notes:@ San Diego 2B Eckstein was back in the starting lineup two games after getting hit in the chest by a pitch from Carlos Zambrano in the series opener on Friday night. .... Cubs 1B-cleanup hitter Derrek Lee was a late scratch due to illness.