OMAHA, Neb. — As the Florida Gators made their way through the tunnel under the grandstand at Charles Schwab Field a security worker blurted, “Welcome back, Sully.” The Florida Gators have made Omaha a second home enough that the security guards recognize head coach Kevin O’Sullivan. It’s true, O’Sullivan had managed nine teams that have made it to the pinnacle of amateur baseball. Florida is a mainstay but they enter this season unlike any other. The Gators are underdogs in Omaha. “I just told Sully. Death, taxes, and Florida in Omaha. Those are three things you can pretty much count on.” The…