Compared to 30 years ago, pitchers today throw several mph harder on average.
- When a pitcher in yesteryear got hurt they continued to pitch in a less effective manner, or else they broke down and were permanently replaced by a less effective pitcher.
- Pitchers today get better medical care and soon get back to full effectiveness. The best pitchers stay on the mound longer and at a higher rate of effectiveness than if they pitched in prior decades. This is a major reason why strikeouts are up and scoring is down.
Compared to 30 years ago, pitchers throw several mph harder on average. The fact that pitchers are throwing harder than ever before puts a lot more torque and stress on their ligaments and rotator cuffs, which leads to increased risk of injury. Some of this strain is alleviated by more careful handling, pitch counts, innings limits etc.
Bigger, stronger pitchers throwing harder means more risk of injury.
Better, more careful handling of pitchers means less risk of injury.
Careful handling of injured pitchers prevents minor injuries from turning into career-ending injuries and keeps pitchers performing at peak effectiveness more often.