text: Giants Defeat Padres 7-5 SAN DIEGO - Edgardo Alfonzo's two-run double capped a six-run rally in the fourth inning, and the San Francisco Giants tied the Chicago Cubs for the wild-card lead by beating San Diego 7-5 on Tuesday night.    The Giants remained three games behind NL West leader Los Angeles after the Dodgers' 5-4 comeback victory against Colorado...