Also, if he's so good he's a team captain why are we carrying Hall and drafting Quinn?

This is kind of a ridiculous post, unless tongue-in-cheek.

- Kuhn is a captain for the week. In the NFL this is the equivalent to the "Participation" ribbon we got as kids. Many players are captain during a season, even ones who aren't great players (like Kuhn).
- He's a decent fullback, better than Hall. Obviously they think Johnson will be a very good fullback, which is why they drafted him. Hall is also a decent fullback and is good on special teams, which is why he is around.

If they have multiple captains every week what's the point of having them at all? I doubt they get even a little trophy or pizza party...

Some teams elect captains for the year (ie, Vikings picked Favre as captain for the year).

Some teams elect different captains every game. That's what the Packers do.
Every game is a different captain. All they do is go out for the coin flip and it gives many players an opportunity to do something that most players on other teams don't get to do. The players actually like it.

Wait, so you're saying all those "Participant" ribbons I won in school that I have framed in my office are... What now?