Sammy Sosa hit his 48th and 49th home runs to take the major league lead, but Colorado still defeated the Chicago Cubs, 11-3, today as the Rockies announced the resignation of General Manager Bob Gebhard.

Pedro Astacio (14-9) pitched a seven-hitter to win his fourth straight decision, striking out nine and walking two in his sixth complete game.

The Cubs lost for the 22nd time in 27 games.

"I'm pretty concerned about the way we've been playing," said Sosa. "I had a great game. But in despite of it, the situation here is that we've really been struggling.

"No matter what we're doing, we're still losing. I have a great game and we still lose."

With two solo shots, Sosa moved one ahead of Mark McGwire, whose Cardinals were rained out in their game with the Mets in New York tonight.

Vinny Castilla hit a two-run homer, his 26th, and had a two-run single for the Rockies, who are just 15-23 since the all-star break.

The losing led to the departure of Gebhard, the first and only GM since the franchise began in 1991, two years before the Rockies started play.

Mark Grace and Sosa homered back-to-back in the third to make it 4-2. But the Rockies took a 7-2 lead in the fourth, knocking out Kyle Farnsworth (2-7). Castilla's two-run single off Steve Rain highlighted the rally.

Sosa, who also singled, homered again in the sixth--both against the wind--before Astacio got him on a foulout in the eighth.