2.  A GM (general manager) essentially runs a baseball team  They are responsible for all the decisions a team makes with its roster

3.  Many GMs these day rely on sabermetrics, and advanced metric system that provides a different way to look at baseball players, invented by Bill James

4.  Billy Beane, Oakland A’s GM, is famous for using sabermetrics to put a team together

5.  You must have some sort of degree in sports management or already be involved heavily in MLB  You’re going to have to work your way up  You must produce results (wins), or you’re done