The Wrestling Lineage Tree ( wrestlingtree.com ) traces the history of NCAA Wrestler's instructors (head coach where they got their undergraduate degree) with a focus on Wrestlers who are involved in the Olympics or MMA. From it you can see how much of an influence Wrestlers have on MMA/UFC and the Martial Arts world. (clicking on the wrestler's name will have links and information to official websites, etc)
The interesting thing is about 70% of Wrestlers and coaches can trace their lineage back to E.C. Gallagher at OSU (Oklahoma A&M). The remaining ones either to IOWA or Yale.
If there is anyone that is missing or whose lineage is wrong let me know. (Shane Carwin's lineage is wrong. Phil Baroni, Billy Sheridan (Lehigh) Hubert Hub Jack (Lock Haven) are missing right now becuase their lineage cannot be found)