Sorry, but I have to agree with the other poster. A interview is all about taking a bulk of qualified candidates and the hiring manager or zone director hand picking the candidate they think will best fit into the position. There is nothing illegal about that. Every displaced rep would be qualified. Now it comes down to managers preference. This is how interviews work in the real world. You don't need a reason for not hiring someone. I use to be a sales recruiter. I have seen several great reps that I thought were sure things, walk out without the job because the manager and the rep just didn't "hit it off". I have also seen several reps that I thought would just be time fillers, get the job because they "hit it off" with the hiring manager.
The resume gets you the interview, but the rep gets the job. I don't see how this situation would be any different. If you think you are guaranteed a job for any reason, you will be disappointed. No matter how good your numbers are, how much tenure you have or where you live, you will have to compete for the job.