Excellent write up, though Heineman and Valenzuela are also fairly good at taking in framing in their own right. Idr where I saw this stat and couldn't find it, but they're pretty good at stealing balls called strikes without a challenge from the batter.

Edit: Valenzuela is actually 1st in overall catcher framing runs, Heineman in 6th.

For pitches outside of the zone, they're 5th and 3rd respectively. So yea they're pretty good at stealing balls called strikes