New San Francisco Giants manager Tony Vitello seems unfazed by the pressure of his jump from the college ranks at Tennessee to the big leagues. Vitello was hired as the Giants’ manager with no professional playing or coaching experience, and the team introduced him on Thursday. He plans to get into spring training drills alongside his players, throwing batting practice or hitting fungoes in an effort to help improve some fundamentals. And he intends to lean on the veterans who have been doing it for decades.