Never heard of them. But then, it seems sometimes sports teams in general can be a bit like a fraternity, not with having letters or ritual or anything, but with all team members spending a lot of time together and sharing a common bond and such. Then, what would be the point of having such a fraternity, a sports one?
Then again, one of my friends got hazed when she joined the rugby team...that's the kind of stuff we don't want to be associated with fraternities/sororities.
Edited for horrid grammar mistakes. Whoops. 