Mecanim How Animate Bone a Ball Using Humanoid?

hi people, i have an Player Soccer with a Ball, i'm using Humanoid and not Generic!! the bone of the ball is not child anyone member of the body!! and the animation not work! I need to leave the bone free ball

but the bone the ball, it only work if i parent it in any member of the body! =/ in type Generic work fine, but i need use Humanoid with Root Motion!!

why i don't want to animate the player to all angles!! i want to just use my animation the player with ball to -90 degrees and use this animation to all angles ok? can someone understand me? or tell me how make it?