2025:
Several years ago we were preparing our teams for travel to Korea and Japan. During the workout one of our Coaches [now a MLB Catching Coach] mentioned to me when the players were playing catch.
He said "that catcher will is a "one handed" catcher!! "I said how do you know"?
He is using a Mizuno mitt and "broke it in" like a 1st baseman mitt. He cathes one handed and does not shift to the ball. A Wilson mitt does not allow a folded "break in", because is is "rounded" and produces "framing" and shifting to the thrown ball.
Bob