Kevin O’Sullivan turned to a freshman as his Florida Gators opened the NCAA Tournament and it paid off in a 5-2 win over the Nebraska Cornhuskers. “Some people have kind of asked the question, too, that it felt like we were pitching off and saving Cags (Jac Caglianone),” O’Sullivan said after the Gators’ win. “We weren’t saving Cags. I felt like Liam (Peterson) had earned the opportunity to go out there and start and he’d been our most consistent starter the last four or five weeks. It’s really that simple.” Peterson had pitched to a 2.32 ERA over his last five outings heading into postseason …