On the face of it seems poor management but there wouldn’t be a player who doesn’t tighten up with hammies /calves etc as a result of football training.
In my illustrious (not really) footy career, I trained with Box Hill Hawks in a preseason and I got massages regularly after training as both were always tight from getting absolutely smashed with running, jumping, picking up ground balls etc.
If they do all their tests on mobility and passes & the player says he’s fine it’s just plain unlucky.
I can’t for one second think they’d have played him if knew there was any significant risk. They are constantly managing players loads and giving light sessions etc for the whole list through preseason.