Eggman
Striker
You can bowl the ball to a fielder when warming up but it must go directly into the hands and not touch the ground.
Any bowler worth his salt would want to keep the match ball in prime condition, so wouldn't want to bowl it into a dusty or wet outfield.
I'd bowl an old (warm up) ball into the turf but not the one I would be using in the match - it defeats the object of keeping it polished or dry and with a clean seam.
I supose a purveyor of reverse swing might want to speed up the deterioration of a ball, but I can't see there being too many of them in club cricket.