For most of us, the athletes are what make sports interesting. But if you own the team or run the league, your players are essentially very expensive migrant workers who eat into your profits. We talk to N.F.L., N.B.A., and U.F.C. executives about labor costs, viewership numbers, legalized gambling, and the rise of e-sports. (Ep. 5 of “The Hidden Side of Sports” series.)

Great athletes aren’t just great at the physical stuff. They’ve also learned how to handle pressure, overcome fear, and stay focused. Here’s the good news: you don’t have to be an athlete to use what they know. (Ep. 4 of “The Hidden Side of Sports” series.)