This past season, the St. Louis Cardinals promoted John Mozeliak to President of Baseball Operations and installed Michael Girsch as GM. This shift is very important to the Cardinals.
The organization of MLB franchises has become more complex over the last decade. They now deal with increases in salaries, revenues, draft slotting, and international spending limits. Most franchises also now have an analytics department to assist with player development. Consequently, a MLB franchise has become much more difficult to manage.
Ownership also finds itself looking for ways to keep increasing revenues to keep up with the cost demands of running a franchise.