With MR, I don't think it is just about giving it your all during practices and games. He has specifically stated he loves "gym rats". I'm sure he has eyes on all his players and knows who is spending their free time in the BDC, regardless of what they are doing. Then you get more points for watching tape, spending time in the weight room, putting up shots outside of practice, spending your extra time studying in the BDC and/or just hanging out in the BDC on your free time chatting and talking about basketball.
I've worked for bosses like that and it can be a bear. In science, we have the "lab rat". The person that spends all their waking time in the lab....regardless of what they are doing.
Unfortunately, I was not one of those people....LOL. I knew people who got in the lab before the boss and stayed until after the boss left.....15-18 hours a day. I would come in for 8 hours, get the same amount of work done as the person who was there dicking about for 15-18 hours, yet they would get all the praise. I don't need to be sitting in the lab to read a scientific paper or plan my experiments, write a grant or chit-chat with others, wasting their time. I can do that at home

But that won't get praise from the boss.
Granted, basketball is much more of a physical activity and requires hand on experience to get better (although science does requires doing experiments). But I think MR also give points for someone who has the basketball "passion" and who enjoys just being present in the BDC as well as putting in extra work.