Pure speculation on my part, but it wouldn't surprise me if Don Mattingly was going through the interview process to keep his name, value and interest at a premium. Therefore when a job opens he really likes he has more leverage.
Mattingly, who interviewed for the vacant New York Yankee managerial position before it was award to Joe Girardi, followed Joe Torre to Los Angeles.
Some consider him the heir apparent to the Dodger's job when Torre retires and that time may be soon.
I could be completely off base and Mattingly may legitimately want the job in Cleveland, or Washington for that matter.
It is at least an angle to think about.