Professional athletes are paid by the sports teams they play for, as well as through endorsements and sponsorships from companies.
Their sponsors.
MLB (Major League Baseball)
Depending on the level of a career that you are looking for, professional job search services and headhunters are definitely worth it. You can also try using a recruiter service in which the company hiring you pays the fee.
Their sponsors!
No one
allot and there sponsor pays for it
the school pays for everything
A customer
Yes
The owner of the teams they play for.
Your clients or the people who pays you for your services.
Yankees