CHICAGO -- Houston Astros second baseman Jeff Kent left Tuesday night's game against the Chicago Cubs after he strained his right hamstring running out a double in the fourth inning. Kent was replaced by Jose Vizcaino, who scored on a triple by Morgan Ensberg. Kent is hitting .293 with 10 homers and 52 RBIss. Adam Everett followed Kent's hit with an RBIs double. When Cubs left fielder Moises Alou tried to pick up the ball, he knocked it into the ivy on the outfield wall. As Alou held up his arms to indicate that the ball was lost in the ivy, Everett circled the bases on the two-base error and gave the Astros a 4-1 lead.