If UConn decides to give him $750k plus he'll never leave. He won't go to a southern school and I'm not sure any southern school would want him since his geographic recruiting grounds and connections aren't well...southern. Florida State and that ilk are not going to start recruiting New England, NYC, Pennsylvania, and northern California. Southern schools aren't a concern.
However, Michigan 100% should be a concern while he's making $280k or whatever. As should Rutgers, BC, Penn State, Ohio State, Maryland, West Virginia, ND, or any other relatively northeastern team that can afford to throw a million dollars a year at him and $200k at his coaches. It's silly to think he wouldn't leave for that kind of money if someone decides to offer it.
My guess is UConn sees this and he gets a raise this year, which actually may be why we are reading about this in the college baseball news to begin with...