CINCINNATI — In a game that started with a confrontation and was delayed by rain for more than two hours, the Giants kept waiting for a punch from their lineup that never came. With a 5-1 loss to the dreadful Cincinnati Reds to open a 10-game swing through the Eastern time zone, consider insult added to injury. The Reds, who still own MLB’s worst record even after Friday night, were without their No. 3 hitter, Tommy Pham, who was scratched minutes before the rain-delayed first pitch over a pregame altercation in which he reportedly slapped Joc Pederson in the face. Yet, it was the Giants who l…