Eliminated from playoff consideration and in a downward spiral after losing 12 of their last 16 games, the San Francisco Giants still have plenty to play for starting Friday in the opener of a three-game series at Los Angeles against the Dodgers. The matchup is one of baseball's oldest rivalries, which will no doubt heighten the senses, but there is also the matter of delaying the Dodgers' celebration of an unprecedented seventh-consecutive National League West title. The Dodgers enter Friday's game with a magic number of four.