You will not find the names of a grievance committee. The reason is that the USTA does not want you contacting them directly, nor going after them if you don't like their decision. The only person you will know about later is when the grievance decision comes out is the chair of the grievance committee.
If a captain wants to file a grievance, they can, the LC cannot tell them not to. They can try to dissuade them, but they cannot preclude them from doing so. If they file the grievance, it has to go through the process of the committee.
Just submit the facts as you know them and leave it at that. Most grievance committees know the rules and will rule accordingly.