Reference #257: The First 90 Days
When you join an existing team as their new leader, you will likely inherit some outstanding performers (A-players), some average performers (B-players), and some who are not up to the job (C-players). How you should handle this mix of individuals depends on several factors including business situation and how critical each team member's position is.
For example, in a sustaining success situation you may have time to develop high-potential team members.
Not every position requires an A-player; assess the criticality of each position while considering what you do with your team.
Watkins. The First 90 Days, 2013. (170, 174-175)