Jinto wrote: Is Carry the only thing that would stop fumbles i would hope so and its not some off the wall thing like passing to help him carry better

This is correct

Is your safety playing at running back? Or does he just get so many interceptions that he has that many fumbles??

I'm going to bet that consistency and possibly positional rating comes into play as well.

If someone has 12 carrying but 2 consistency and isn't a natural RB(or just started playing there), he's going to fumble more than the guy with 9 carrying and 15 consistency who's been playing the position all his life.

I'd say they probably do. Better tacklers, at least in real life, have a better chance of creating fumbles.

But this is something that you can't do anything about as far as who will hold onto the ball best for you.