Gee... that was a LONG time ago in a quickly developing sport. You know what else? All those guys were also NCAA wrestlers. Could there be something there? Chael and Couture sure shot a lot of doubles! Might be an NCAA thing? Also interesting: Couture multiple losses to NCAA wrestlers Lesnar and Lidell. Sonnen with losses to NCAA wrestlers Evans and Ortiz.
Mark Madsen's UFC career looks to be derailed. The Olympic Greco medalist was just choked out by American high school wrestler Grant Dawson.
I think wrestling is a great base, but all of the mentioned Americans who have had success are guys who wrestled high school and college. They have great ability to hold people down, for one thing.
BTW Kevin Jackson was a champ in the #2 American organization at the time. Alger and Jackson both won the wrestling portion of the fight,; both were arm barred. (Inoue, who beat Alger, actually submitted Couture with an armbar too- Greco couldn't save him)