PepsiCo Inc. on Wednesday announced a series of senior executive changes, including the departure of Tom Greco, CEO of Frito-Lay North America or FLNA. The company has promoted Al Carey, CEO of North America Beverages or NAB, to CEO of North America. Carey is a 35-year veteran of PepsiCo. Analysts see Carey’s promotion as boosting his chances to eventually replace PepsiCo CEO Indra Nooyi.