Cubs' offense struggles

HOUSTON - Lou Piniella is beginning to worry about the Cubs' sputtering offense. Wandy Rodriguez struck out seven, and the Houston Astros again stifled Chicago's bats in a 4-1 victory on Saturday night. Rodriguez (5-3) allowed nine hits, including a solo homer by Cubs starter Carlos Zambrano, but Chicago stranded seven runners and dropped its third straight game. The Cubs lost 2-1 to the Astros Friday night. Chicago was the NL's highest scoring team before the All-Star break, scoring 507 runs. The Cubs came into Saturday's game with a NL-best .280 team batting average, but they've now mustered only four runs in their last three games. Chicago lost 4-2 to San Francisco in its last game before the break. “We're not getting much hitting anywhe