It sounds like your contradicting yourself by stating: Any increased blood flow that comes from further exercise would be negated by the further muscular damage that occurs with moving body parts.
And then recommending all of this:
Immediately after leaving the mound, they go to the bullpen area and do one set of ten "reverse throws" with a 2 lb. mini-medicine ball (this involves going to one knee and throwing the ball behind you into a wall). This is followed by about five minutes of J-Band work done at a quick pace. Then the two lb ball again for 2 sets of 15 reps doing upward tosses and side lying tosses. The first involves simply standing up and flipping the ball into the air from the waist and catching it on the way down. The second does basically the same while lying on your side. Then he will use the bands again, first grabbing them with two hands in the middle and pulling them apart two sets of 15 reps and then doing basically the same with a diagonal pattern. After that, I use a Body Blade to do three sets in a pitching motion.
This seems like too much active recovery prior to the Marc Pro.
The Marc Pro and other estim devices are simply using electricity to speed the recovery in comparison the time it takes to properly use heat and cold to do the same thing (contracting and relaxing of the muscles and tissues).