I grew up pitching in the 80s and 90s (decades, not velocity) and we had strict limitations on pitches and days we could pitch. We did not come close to pitching all year round though. My in house leagues had inning limits each week for different levels. For example in Bronco you couldnt pitch more than 10 innings in a week. Also if you pitched more than 4 innings in one game you couldnt pitch the rest of the week. Never saw a pitch count rule in any league in the 80s or 90s. Also, travel ball there was no restrictions at all. The other thing was how you pitched in travel had nothing to do with the in house rules. So, an in house league could say our pitchers arent pitching more than 10 innings a week. But, in reality they pitch 10 innings for their in house team, also started and pitched 6 innings for their travel team, and came in and closed a game for their travel team. There was a lot of bending of the rules in the 80's and 90's. Not to say there isnt now but I've seen much stricter inning rules and how they combine with in house and travel in the youth leagues now.