Which American kickboxer based in Scottsdale Arizona has been beaten in world championships by Changpuek Kiatsongrit?
Changpuek Kiatsongrit:  Changpuek is a seven time world champion who has fought some of the world's best fighters at middleweight to heavyweight and has wins against world class fighters such as Rob Kaman (x3), Rick Roufus, Peter Smit and Tosca Petridis. Rick Roufus: Rick John Roufus (born June 3, 1966) is an American kickboxer, fighting out of Pound Gyms in Scottsdale, Arizona.
Rick Roufus