Re: College Athletes
For the purpose of a speech class assignment, it doesn't really matter if I agree or disagree with your premise. Barring any problems with the actual delivery of the speech, you will be successful if you give a thesis and provide valid, logical arguments in support (looks like you are accomplishing that imo). To truly stand out, do like another poster stated and acknowledge the other side of the argument and be able to rebut those arguments.
FWIW, I agree with others in that maybe it should be college athletes as a whole and not just specifically football players.