Giants president of baseball operations Buster Posey made history this offseason, hiring an incredible college baseball personality with zero big league experience as San Francisco’s new manager.MLB commissioner Rob Manfred joined KNBR’s “Murph & Markus” on Tuesday morning to give his opinion on the Tony Vitello hire.“I think the hiring of a college coach to be a big league manager is part of a larger evolution in the relationship between college baseball and MLB,” Manfred claimed.Vitello, on Wednesday, will become the league’s first manager without any prior professional experience, but his preparation isn’t in question.The Giants went 19-9 in spring training, even without some key pieces due to the World Baseball Classic. It’s challenging to gauge talent from spring training for several reasons, but the culture shift since Vitello’s arrival is hard to miss.“The college programs … many of them are high quality,” Manfred continued. “They produce players that we draft in increasing numbers every year.”There are many ties between Vitello and players within the Giants organization,...