Doesn't the catcher's arm figure into whether the runner even attempts a steal?
Plus, there must be some situational factors, I would think (but who knows) that affect if the runner attempts a steal.
Plus, the catcher's effect would, one would assume, also be affected by some aspect of the pitcher's rating, so that a poor catcher's arm is
enhanced by a pitcher with a high hold rating.
But this is just conjecture on my part.
I'm just wondering this out loud for comment.
In a league I recently finished my catcher had a 60% caught stealing rate.
The among the starters, at the upper end, Greg Maddux had a 75% caught stealing rate, and at the lower end, Sandy Koufax had a 45% caught stealing rate.
So, it seems the catcher's effectiveness also depends on who is pitching.