SAN FRANCISCO — It’s been two decades, but Tony Vitello still remembers it like it was yesterday. Vitello was a young assistant at Missouri and was quickly gaining a reputation for being one of the country’s best recruiters. He had helped get Ian Kinsler and Max Scherzer into the program, and he now had his eye on a tall, lanky left-handed pitcher in Texas. He remembers calling the kid, a future big league All-Star, as he was driving on the highway late one night.“They had played in a tournament in Norman, Oklahoma, and he’s telling me how he hit a homer,” Vitello recalled this week. “I remember joking, ‘Maybe if you come to Missouri, we’ll let you hit, too.’ Back then, he was arguably the best lefty in the country.”That former Texas high school star will be at Oracle Park on Saturday. The Giants are holding a day to celebrate Brandon Belt, and Vitello is excited to see him. Belt might be more fired up to meet, though. Over his 12 years in San Francisco, he never wasted an opportunity to talk about what a great pitching prospect he once was, and the new Giants manager can vouch for that as well as...