May 19, 2010 2:04 AM
CHICAGO (AP) - Carlos Silva pitched six strong innings to remain unbeaten and the Chicago Cubs overcame Todd Helton's first home run of the season to beat the Colorado Rockies 6-2 on Tuesday night.
Tyler Colvin had three hits and fellow rookie Starlin Castro drove in two runs for the Cubs, who have a three-game winning streak. With the two-game sweep of the Rockies, Chicago won a series for only the fourth time this year.
Silva (5-0) allowed two runs on six hits in joining the Yankees' Andy Pettitte and Phil Hughes and San Francisco's Tim Lincecum as the majors' 5-0 pitchers.
Silva had been a high-priced bust for Seattle, where he went 5-18 with a 6.81 ERA in two years. The Mariners insisted the Cubs take him in December's deal for troubled outfielder Milton Bradley.
(Copyright 2010 by The Associated Press. All Rights Reserved.)