This shows that brookies can grow big, when they have the opportunity.
I've read things on this website and others saying that brookies can't grow big because the big brookie genetics were lost. And others said that they didn't even grow big "back in the day," and that the historical accounts of big brookies were just "romantic," exaggerations, not accurate accounts.
This and other large brookies caught in PA show that these "theories" are bunk.
If the habitat is good and they are allowed to grow for years, rather than getting ripped out and killed, they can grow big.