How does someone get a job as a professional gamer?

My friend's dream job would be a professional gamer. He doesn't know how to go about it. He's never seen these jobs posted or anything. How does someone get a job as a professional gamer?|||first he should become an online gamer, then he should register on MLG at www.mlg.com and win some tourneys for money, after you've made a name for yourself post on a mlg or gamebattles for a sponsor for your team, the rest is up to you and your skill