If you begin having doubts about your career decision, you can always switch to something else. People do it all the time now. To help rehabilitate himself, he developed a support group and fitness program which became the basis of a new business. He went from being a basketball player to someone providing self-help resources. Lucas also went on to coach the San Antonio Spurs and the Philadelphia 76ers.
Competitive athletes are especially likely to have several careers.
Many start out as full-time athletes and then enter business or professional careers. But a few start out in business or professional careers and then switch over to sports. The trick is to recognize a good opportunity when it comes along, even if it wasn't expected. You could pick the career that pays the most. This may sound like a good idea, but it can be hard to pull off.