DeRosa, Cubs unload on Astros

CHICAGO - Mark DeRosa said he wasn't sure if the curveball he hit in the third inning would make it to the left-field bleachers. But it did. DeRosa's second grand slam of the season gave the Cubs a one-run lead against Houston and touched off a frenzy among the 41,107 fans, who shouted for him until he came out of the dugout for a curtain call, at Wrigley Field. “That's my first curtain call of my career,” DeRosa said after the game. “... It's nice. It makes you feel good. It's one of those moments that you don't forget.” But the Cubs weren't done. They went on to score four more runs, including three on a homer by the similarly streaking Alfonso Soriano, in what became an eight-run third en route to a 11-4 win Wednesday. The victory kept