ATLANTA — Ervin Santana pitched five-hit ball for seven innings to remain unbeaten, Ryan Doumit snapped a scoreless tie with a pinch-hit double in the seventh and the Atlanta Braves beat the Chicago Cubs 2-0 on Saturday night. Santana (4-0) overcame a rain delay of 1 hour, 7 minutes in the third inning and outlasted Cubs right-hander Jeff Samardzija, who had his long winless streak continue. Samardzija lowered his ERA to 1.45, second in the NL, but he is still without a win this season.