Pacing yourself is the worst advice anybody can ever tell you as a pitching coach. So people here throw 90%? Do you guys realize that if you were to top out at 85 mph, and if you scaled back to 90% that you would be throwing about 76 mph? Comeon, that's a ridiculous amount to scale back. When you watch big leaguers on tv, they may sit around 90, and when they reach back they may hit a 93. That is just a 3 percent difference, which isn't a whole lot. You have to throw the ball with conviction, you don't do that at 90%. You pace yourself and throw the ball soft four 2 innings and get taken out due to whiplash, what will you use all your energy for then?
The problem with some of you youngsters is you don't throw enough. And you don't workout enough. When I say throw, I'm talking about throwing long toss, and not just throwin 20-30 throws. You have to prepare your arm to throw hard. If you don't, then yes, you will get tired quickly. Throw hard, and throw often, and you won't have a problem ramping it up to close to 100%.