"fernandez's future is in his shoe contract and prize money"
Maybe. Probably not, though. How much does someone like Teg make. 100k? 200k? After taxes, agents, and coaches it's even less.
That's not bad for someone in their 20's, but all it really does is allow you to pursue running full time. It's not going to set you up for life.
Once your career is over at 30-35, you're going to need a job.
Best case scenario is that maybe GF makes enough to save a million bucks over his career, and that assumes he becomes a real star rather than a boy wonder.
If you think that amount of money will last you from age 35 to age 85, then you need to take some basic math and finance classes.
More likely, though, is that he ends up saving a couple $100k - and even that assumes he has a pretty good pro career which is not guaranteed. A couple of 100 thousand will not last long at all once you are not making much money anymore.