I've noticed this with alot of big men on the game. The problem that I've found is -
1. - 2K did not set alot of low post plays for the bigmen in the teams playbooks for some crazy reason this year. I've had to go through and lower the amount of pick and roll plays (very high amount for each team) and increase alot of low post plays so the big men will get the ball.
2. Looking through some of the Center's and PF's tendencies, 2K has there low post shots tendency set really low? I don't know why 2K did this but I'm betting it will help with this.
I'm really begging to believe alot of the problems we are seeing this year from the gameplay is not the game itself, but the rosters that 2K-2KInsider is putting out. He doesn't have players tendencies, team's playbooks or coaching profiles very accurate at all. I remember Vanwolf said that 2K slacked on playbooks again this year even though he pinpointed things to them about the problems of 2K12 playbooks, well its carried over into 2K13.