Two teams shackled with losing streaks but generally feeling pretty good about their recent play knock heads Friday night when the Atlanta Braves and San Francisco Giants open a three-game series at AT&T Park. Braves left-hander Jaime Garcia, who will be making his major-league-leading seventh road start, and Giants righty Matt Cain, who has been about as good as they come in his four home outings, will duel in the series opener. The Braves are coming off a homestand in which they won five of the first seven games before taking consecutive losses against the Pittsburgh Pirates.