[packs]

I haven't seen anyone offer any evidence that pitchers throw harder today than they did in the past. The reason you hear about so many guys throwing 99 or 100 is that they are specialized pitchers. They throw one inning. If they threw more than one inning they would be useless because having only one pitch is a death sentence to pitchers. Back when Ruth played you either had three pitches and could throw seven to nine innings a game, or you threw multiple innings in relief. You would have still had guys throwing 99, but if they only threw 99 they weren't going to be successful in the past iterations of baseball.