Even your own Shane Bieber is not prepared to pin the blame on the pitch clock, at least not yet...

https://deadspin.com/guardians-rhp-shane-bieber-not-ready-to-say-pitch-clock-1851395919

possibly add Framber Valdez to the list of the walking wounded...

https://www.mlbtraderumors.com/2024/04/framber-valdez-scratched-from-start-due-to-elbow-soreness.html

from a couple of years ago after he suffered his serious arm injury. More perspective to consider...

Arm/shoulder injuries have been building in frequency as the game, arm strength, pitching motion, and pitch selection has evolved. Perhaps not in clear linear way. Or with any defining speed. But they have been building.

It's like adding straw to the camel's back. Eventually a limit is reached. The pitch clock -- or lack of rest between pitches -- may be the straw that exacerbates injuries to a new level.

Here's Aaron Boone's take on it:

Link to tweet

There is correlation, but nothing to prove causation.
In fact, since the pace of the game has reached that of the late 70s to 1990, comparing pitching injuries does not correlate. Far fewer injuries, with pitchers burning more innings, where the amount of time between pitches is roughly the same. And, that time period aligns with the refinement of TJ surgery. Very good restorative surgery existed, yet used less often.
I believe the culprit is the emphasis on throwing every pitch hard & focusing on spin rate. Add to that more rigorous weight lifting and you have strength & speed that exceeds soft tissue tolerances.
I think it's much simpler to assign cause to trying to throw a hundred 35 or 40 times a game, and maximizing movement on every pitch, because they don't want pitching to contact anymore.
The very act of modern pitching is more than most human arms can handle.

You will be shocked at the damage".