Control of Ball

[tzme415]

Does the fielder just have to posess the ball or have actual control of the ball for a force out?

Sitch: Ground Ball to F6, throws to F3, F3 is bobbling ball, but ball stays between glove and hand. Do I have to determine when control was gained to detemine if BR is safe? Or if F3 has ball and it never leaves his posession by popping up in the air or hitting the ground is this enough? What if the ball gets stuck between F3's arm and stomach - he has possession but not necessarily control of the ball?