[neilellis]

I agree.

I would say we all can be A or B players depending on a huge mixture of psychological factors including what people think of us, what we think of ourselves, what we think of the job we do ... and countless more.

If someone's company is full of 'B players' in reality they're saying their company is full of under motivated people. Why they are under motivated is a different matter and can be a complex affair usually combining internal and external factors.