SAN FRANCISCO — Saturday could have been Barry Zito’s saving grace as a Giant.The left-handed starter could have channeled his early-2000s self, unleashed his knee-buckling curveball and pitched the Giants to their first postseason in seven years.instead, the guy on the mound in Saturday’s 4-2 loss to the Padres at AT&T Park was the same … Continue reading Zito can't deliver when Giants need him most