First of all break out your contract and read your supplement. As rules very by area about this subject. Also talk to your steward...
However if you came in and they asked you do another route because you where the only one that knows it and you agreed you have no grievance as you agreed to do it..
Not true but thanks for playing.
If he was the only one who knew it and they told him he's doing it then he has a grievance.
Ups doesn't ask, they just instruct and threaten. If they asked and he said no, then they said "sorry we aren't asking anymore ", he has a seniority and bid route grievance.
Didn't you know that already Mr ORS?