"You see more non-great in their sport coaches in Basketball and Football at the highest level (some never having competed in the sport even). Doesn't work in wrestling."
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Ed Gallagher, Oklahoma A&M (now OSU).
In his wrestling coaching career at Oklahoma A&M, his teams went 136–5–4, including 19 undefeated seasons and 11 NCAA titles.
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On the other hand we have Kevin Jackson. Hell on wheels on the mat. A great one but didn't make it as a head coach. Mark Schultz is another, though his school quit on the team so we never quite got to see what he could really do as a coach.
Overall, being a wrestler who then coaches is an advantage. Given that, it is the intangibles that matter as we have seen in the true greats as they work with their kids.