Well, they over-signed this class by a lot, fully expecting many of their recruits to sign. They're likely to lose Nolan Watson and Tristan McKenzie, and Denton from Ravenwood. But they're hoping to hold on to Everett and Day, who both were projected as potential first rounders.
Boras represents Everett, so the fact that he fell out of the first round likely means he's headed to a draft and follow. Corbin has never lost a draft and follow recruit in his 11 years in Nashville, including Sonny Gray, Tyler Beede and Pedro Alvarez.
Vandy is losing a ton of talent to the Majors this year. This is actually the one year in which the program NEEDS some of these pitchers to come to college.