That's about 1,500 jobs, with an average job life of five years. That's about 300 jobs a year, with about that many colleges feeding them. Consequently, the chance that any given athlete is going to make it as a pro is, well, pretty small. We don't mean to be. If you want a career in pro sports, go for it.
Jobs are far more plentiful off the field than on.
And many can be as financially lucrative as they are personally rewarding.