Tom House wrote about this once but anyone ever experience a difference with a bite guard in? Our team did a throwing program (long toss and exercises) in the fall. My son had picked up a little velocity (not much) but on the last, based on something I had read here I think, I had him do one of this last throws with an under armour bite guard in and he threw 4-5 mph faster then repeated it 4 times in a rose. Not sure if it was real or placebo but the coaches thought it was interesting.