I'm sure they have done that already with all the biomechanical work that's already been done. As far as poss. causes, better understanding of the long-term value of the pitcher, batters are more concerned with working deep into the count than they were in the 60s raising pitch counts, and they're putting more stress on their arm than it once was. What was the typical pitch count in the 30's, 40's, 50's, 60s, and 70s? I understand that the mound was higher and that helped relieve the stress but I'm curious on the difference on amount of pitches. I looked at the NL in 1950 when runs were most similar to they are today in the NL. It was probably similar, the big thing to look at is their careers. The elite pitchers always stuck around which is why they were elite. Back then, they had 10 pitchers in the NL that made it to 2000+ career innings. Right now, there are 10 with 2000 IP and likely 10-15 more when all is said and done. Sure they're throwing less but if you can double the amount of pitchers staying healthy enough that will give you more of 10 years worth of +200IP, it's worth it trying to conserve the better arms. Wouldn't the 5 man rotation have something to do with that though? In the 50's, didn't some teams even have a 3 man rotation thus meaning they would have less 200IP guys? Also, there are a lot more pitchers then there are now as there are almost twice as many teams as the 50's.