Jinri Park has spent over a decade rolling. She's trained long enough to know the difference between a good training session and one where she leaves the mat feeling small.
John Danaher has never competed in jiu-jitsu. He's built his entire coaching legacy on the backs of students who did—Gordon Ryan, Craig Jones, Rory MacDonald, the Ruotolo twins.
Somewhere out there, a BJJ gym owner is writing a check to an organizational development consultant who has never set foot on a mat. The consultant has a master's degree, a LinkedIn with 4,000 connections, and a very thorough intake questionnaire.