While streaks have to be getting a little old for the San Francisco Giants, when the good ones outweigh the bad, the ups and downs probably become more tolerable. With each loss on the current skid, the bad moves closer to canceling out the good, something the Giants will try to end Friday night in a visit to the Philadelphia Phillies. The Giants (30-25) have three winning steaks and two losing streaks of at least five games, including one eight-game surge as well as an eight-game slide.