SAN FRANCISCO — Tony Vitello spent the offseason playing catch up. Vitello had so much to learn about the Giants in so little time that he found himself squinting at times as he walked through the hallways at Scottsdale Stadium this spring. He would see a face and think he knew the corresponding name, but at times in the first few weeks, he couldn’t quite be sure. Vitello spent plenty of time talking to guys like Buster Posey and Sergio Romo about their experiences, but he didn’t have the time to do a deep dive into the details of the championship years in San Francisco. If he had, he might have discovered a little nugget that might help him more easily get through Sunday’s day off. Until Saturday, it had been 14 years since the Giants started a season with three consecutive losses. That 2012 team won the fourth game behind a stunning effort at Coors Field from Barry Zito, and of course, that group also went on to win a championship. Right now, Vitello would settle for his first win. Or maybe even just a first extended rally from his lineup.The Giants again came up well short Saturday, losing 3-1 to the New York Yankees to...