Well since pitchers used to throw at least 150 pitches a game back in the day I do think the pitchers should be able to throw more. Although It should be said the reason they started throwing less in my opinion is because managers would rather have 90-100 pitches at max velocity then 150-175 at 75% velocity, which is how they are able to do it. Pitchers should be able to go 130 on average but they don't because they never build up the arm strength to do so, and because they pitch 100% all the time. Come to think of it that is the reason more than anything else you see so many injuries these days to pitchers arms. They throw full out soooo much their elbows/shoulders begin to break down. Throwing with less velocity, even if you throw a lot more pitches is better for your arm. Think about it. If you went out and played catch throwing 20 times all the way to home plate from left field your arm would be more tired and hurt more than if you threw 35-40 times just to the cut off man. Thats the best example that comes to mind that the average joe, like myself, can relate to.