Backing Someone Down

Sometimes when I go to back someone down, with less strength than my guy, I can't. I don't know why. I have Kendrick Perkins on my team off the bench (98 strength) and he can't back people down with like 80 strength, also Al Harington has like a strength in the 60's and he can hold his own against Al Jefferson for me (94 strength, I think). I was wondering if there was another factor in it, like stamina or something, although I don't think that would be the reason because even when I have more stamina I can't back them down. If anyone knows the reasoning behind this it would be real nice to know.

Thanks

I'm also confused by this, I thought it was only the strength rating that decided who won back-downs...

Well Harrington vs Jefferson is a wash, Jefferson is 82 strength, Harrington is a 75 strength.

But Perkinds should be able to back down anyone, i agree.

I'm not sure, with Curry (91 strength) i can back down virtually everybody except the bigger centers like Shaq and Traylor.

Vigor and defense maybe add to strenght to avoid backing down...
i LoVe THiS GaMe!!!

Agreed, I'm pretty sure defensive awareness also plays a role.