Simon Marcus is a Canadian-Jamaican Muay Thai kickboxer, that defeated which American professional Muay Thai kickboxer, twice?
Simon Marcus:  Having turned professional in 2009, he had a breakout year in 2012 when he beat Kaoklai Kaennorsing for the WPMF World Light Heavyweight title and defeated Joe Schilling twice in a notable rivalry. Joe Schilling: Joseph Francis "Joe" Schilling (January 13, 1984) is an American professional Muay Thai kickboxer and mixed martial artist who competes in the Super Middleweight and Light Heavyweight divisions of kickboxing and the Middleweight division of Bellator MMA.
Joe Schilling