Question about big men

Hello people! Just a quick question

I've been playing offline MyLeague and I prefer playing with old school style of play with more posting up. It frustrates me when one of my big men (C/PF) just roams around the perimeter uselessly, minimizing chances for offensive rebounds, and covering my shooters. I tried tweaking the 'system proficiency' feature and set my play style to 'Post Centric', but it does not seem to change anything. Any idea how to make big men stay inside the perimeter?

Any response would be appreciated. Thank you!

You can try to edit the tendencies of the big man. Increase his post-up tendency and ensure that all three-point shooting tendencies are zero.