un homer in the first, doubled and scored in the fifth and homered again to lead off the seventh. It was his 24th career multihomer gamer. Ramirez has finally started to heat up after hitting just two homers in the season's first two months."I'm more comfortable," Ramirez said. "I'm driving the ball more, driving in some runs. It paid off, the kind of work I was doing."
Pena homered leading off the fourth and added a two-run shot in the fifth for his 20th career multihomer game. Pena and Ramirez each drove in three runs.
"I keep on saying, if you ask (hitting coach) Rudy Jaramillo, he'll tell you every day in the morning we're working in the cage and working on trying to get that consistent swing and I can't tell you that I feel outstanding at the plate," Pena said. "I'm glad I'm able to contribute, but I know there that there's still work to do."
The longball barrage backed a strong outing by Cubs starter Matt Garza (4-6), who threw 7 1-3 innings, allowing three runs on five hits. He struck out six and did not issue a walk.
"Attacking the zone, keeping my team in the ballgame, that's what I'm supposed to do," Garza said. "I didn't want to come out, but (Cubs manager Mike Quade) made the call. It was the right move, I was already at 110 pitches. As a starter, you want to go out and finish what you start."
Rockies starter Jhoulys Chacin (8-5) struggled with his command and lost for the first time in four decisions, allowing season highs with six runs, nine hits, three homers and seven extra-base hits. He departed after throwing 107 pitches in five innings.
"Unfortunately, Jhoulys didn't have it today and that happens once in a while," Rockies manager Jim Tracy said. "He couldn't get the ball down today and he paid for it."
Carlos Gonzalez homered twice for the Rockies and Todd Helton added a run-scoring single.
"My first at-bat, it was a fastball away and I tried to hit the ball away and it just kept going," Gonzalez said. "The second was a mistake on a changeup down and in."
Gonzalez has 12 homers, including a pair of two-homer games this season.
Chacin hadn't allowed more than one run in any of his four June starts, but allowed two runs in the first Monday. Starlin Castro tripled off the ivy in center field with two outs, then Ramirez homered to left-center on a 1-2 pitch.
"Today my slider wasn't good," Chacin said. "I didn't make my pitches today and I struggled all over the place."
The triple gave Castro a career-best 11-game hitting streak. Castro, who entered the day second in the NL with 104 hits, is batting .384 over his last 21 games.
After the Cubs squandered scoring chances in the second and third, Pena hammered a 3-1 pitch from Chacin into the batter's eye in dead-center to lead off the fourth.
Later in the fourth, the Cubs loaded the bases on Geovany Soto's two-out double and back-to-back walks to Garza and Kosuke Fukudome. With Tony Campana at the plate, Chacin threw a pitch to the screen, allowing Soto to score and put the Cubs ahead 4-1.
Chicago broke the game open in the fifth. Ramirez doubled up the right-field line with one out. Pena then homered for the second time, an opposite-field shot that also came on a 3-1 count. That gave Pena 16 homers, all since May 3, the most in the NL over that span.
