SCOTTSDALE — Tony Vitello’s early sessions with reporters in the offseason were light on details, which made sense. Vitello was trying to get to know an entire roster, staff and more in just a few months before taking charge when the Giants reported to camp last month.But there was one name that came up often in those sessions. Vitello always circled back to Matt Chapman when asked about his effort to get to know the roster, mentioning how important it was for him to meet the third baseman in person, and also joking about how he wished they had exchanged 25 more text messages over the winter. Chapman is one of the team leaders, so ingrained in everything the Giants now do on and off the field that he probably would be the one wearing a captain’s “C” if the Giants were to ever give one out. But he also was very close with Bob Melvin, the man Vitello replaced. It could have been a somewhat awkward transition given the fact that Buster Posey fired Melvin just a few months after Chapman talked about how excited he was to see his longtime manager get another year on his contract. But Chapman said recently that Vitello did not need to win him...