A CNS stimulant is a "central nervous system stimulant". This is anything from over the counter legal caffeine, to drugs like ephedrine, adderal, ritalin and others which "stimulate" or "excite" your nervous system and amp it up.
Bro, you will receive lots of opiniions. Do research, listen to everyone who sounds like they have a clue...but don't actually USE everyone's advice. Decide what makes sense for you. Your goals have everything to do with, well everything. So do your priorities-risk factors, what you will put up with, etc. The drug plan and scientific outline for a weight restricted wrestler will not be the same as a weight-unlimited lineman, even if they both had the same goal of becoming more explosive.
1. Clinically, GH does not considerably fall until 30yrs old on average. Plus, if you take a testostorone ester, you will elevate IGF-I by a minimal 10%. IGF-I is the growth factor that does everything you've read GH does. FYI-GH for a healthy 30 yr old guy by itself will do next to nothing. Part of the reason is that you still have plenty of it.
And, if I understand correctly, you are looking for results with pitching, not wondering how something worked. I am explaining things in detail so that you trust the competence behind the words. Anyway, re-read the former post...lets summarize it again here:
1. Anavar-stores extra creatine phosphate; this system is responsible for all exlosive movements under 3 seconds duration (obviously high velocity arm movements like punching or throwing). ATP is the chemical that allows LIFE and every type of muscle contraction. ATP-CP system is the energy system in the body that supplies this type of energy for this type of work (short duration, explosive, or high force of a repetitive nature). You will not need more than 20-30mg per day to get this effect.
2. A high androgen anabolic steroid-we already described choices in last post-this is another known mechanism in the UG drug world for high level athletes to gain an edge. Just know, your brain communicates with your nerves, and specialized nerves called "alpha motor neurons" are "muscle contraction-signal carriers". The faster and stronger the signal, the faster and stronger the contraction of the muscles involved.
3. Deca would be great-but I am unclear about your testing requirements/priorities/timelines. Deca (nandrolone decanoate) is a 10 ester form of nandrolone and lasts very long in the body actively, and forms lots of lingering metabolites that could nail you on a drug test for almost a full year and a half after stopping. The advantage is that it has a very high nitrogen retention rate (the definition of an anabolic "build you up" process) which accelerates recovery and has natural anti-inflammatory ability which will allow your sore arm and shoulder to endure more stress, longer, and still not be sore or inflamed for longer than a few days-definitely a normal 4-5 day rest rotation between outings will be no problem.
Reasonable sport specific for pitching based on everything we have mentioned and not worrying about a drug test:
200mg Deca/week
100mg Propionate every other day or even 2x week (just make sure one of your shots is post-game on day you pitch so that you will ensure high blood plasma levels and accelerate healing processes during your rest/rotation days)
20-30mg anavar per day
3 grams a day of creatine AKG or similar substitue that has high absorption Cr rate
***you have to do your aggressive/explosive arm velocity throwing drills and attempt to throw harder and faster while on the stuff. This is the only way the whole purpose of taking this drugs will actually manifest into the results you want.
As far as the stimulants, don't worry about it. I just figured to add it in for information purposes since CNS stimulants as a whole are the most abused drugs in MLB. But, as we mentioned, the doses and specific drugs you could use are so varied that it would be a separate entire thread.