I used to bowl with just two fingers in the ball but have recently swictched to throwing with a thumb.  My average increased because became more consistent and picked up my spares but I couldnt seem to strike as much with the low number of revs i was throwing.  I purchased the Pro Release wrist support and can now put more revs with my thumb in and my avg has increased to the 190's.  This large increase has left me wondering why i would not want to use a wrist support but i was told there was an advantage to not using one.  I was just wondering if anyone had any advice on the use of my wrist support.

I think that I am more accurate with a thumb and wrist support opposed to no thumb and i take off the support to shoot at spares.