At the college administrative level, for example, the sports management graduate would be the one who worked toward a job as the college's athletic director. A sports marketing graduate might get a job as the college's sports information director, and would write press releases, news articles, etc. quoting the college's athletic director. It's primarily a matter of managing people versus managing information. And yes, while you can head down the PR/media relations/information director road, most jobs have a sales aspect to them when you have a marketing degree, so consider whether that's right for you.
Good luck!
Hayli Morrison
Mktng. Comm. Specialist
http://www.RiseSmart.com/jobs