To quote a subheading from the original HBR article: > Managers Own the Job of Creating Great Teams At no point does the article argue that job performance

To quote a subheading from the original HBR article: > Managers Own the Job of Creating Great Teams At no point does the article argue that job performance can be measured abstractly, without taking the context of the work into consideration. Using your example, those you're labeling as "B Players" would be "A Players" within the context of their current team.