3 ms·

I don't know the real answer, but my guess is: Pitchers these days pitch harder, train harder, and put more spin on the ball (putting more load on their arm/sho

I don't know the real answer, but my guess is: Pitchers these days pitch harder, train harder, and put more spin on the ball (putting more load on their arm/shoulder). Also, there are more tactical usage of pitchers (putting in someone to get the next out and that's it).

throwaway1777 5y ago
The tactical swapping is part of it, especially since once a pitcher is taken out they can’t go back in for the rest of the game. A lot of the roster pitchers are backups and relievers who don’t play many innings. The starters usually take at least 3 days rest after pitching.