That is the ASMI I refer to and there latest finds cannot establish a link between CBs and arm injury. They have only recently actually tried to find the link to arm injury and the results contradict there old theories. actually they would recommend that you don't pitch period or even throw a BB. We are talkinmg about comparative evils if you will. CBs and especially LL CBs thrown without the tomahawk action are safer than any other pitch. I posted a video of my son throwing it and you could clearly see that it wasn't stressfull on his arm.
You cannot group sliders with CBs.