I was on the bump in the stretch with the rubber engaged, but not at set. I blow into my hand to warm it up and I feels it gives me some grip on the ball and they call a bock onme..?? I can blow on my hand and wipe it off if I'm not engaged?
Rosin bag? What's it for, pros, cons, precautions? Any and all info is good. I can leave it on the bump when I'm pitching?