A general manager needs to be able to find information about players quickly. The Player Search menu option (Manager Menu >> Info and Tools section >> Player Search, or click on the magnifying glass icon in the Manager section of the Icon Bar) serves that purpose:

This screen is a simple list of all of the players in your game world, regardless of league. On this page, you can take advantage of OOTP's Views, Filters, and many of the Common Drop-Downs. Review those sections to get a better understanding of how to manipulate the data on this screen to suit your needs.