Matt Duffy hit a game-ending RBI double with two out in the 13th inning, sending the San Francisco Giants to a 2-1 victory over the Colorado Rockies on Saturday. Pinch hitter Conor Gillaspie set up the winning hit with a one-out walk against Justin Miller (1-1). After Denard Span walked and Joe Panik struck out swinging, Duffy lined a 1-0 pitch from Miller past Gerardo Parra in left for his second hit of the day.