Performances will determine who actually ends up being the eighth-inning guy.
I would love to say that I have an eighth-inning guy, a seventh-inning guy, a left-handed guy, a long guy.
There's absolutely no excuse for throwing a piece of equipment on an umpire or any player. You can argue your point and at times may accidentally bump an umpire, but to consciously throw a piece of equipment at someone is unforgivable.