Who makes the money in professional sports?

Who makes the money in athletics? The players? The sponsors? The broadcasters?

This is for a Sports Economics course, therefore it must relate to economics. 

Must be 3-4 pages, PROFESSIONALLY CITED. 

General Outline: 

1. Provide a general introduction to the sports economics problem/concept you have chosen (1 paragraph)

2. Explain why your paper topic is important (1 paragraph)

3. Give some examples that you found to highlight your paper topic (2 paragraphs)

4. For the body of the paper, break the problem/concept into subsections and explain each (1 - 2 pages)

5. Final Thoughts or Conclusion, including any personal perspectives or policy recommendations (1 paragraph)

6. Works Cited - include links to news articles and web sites (1 paragraph)