IAMTF Women's Lightweight title Defense: Roxy Balboa To Fight Against Rachel Sahlberge. Feb 10th 2009 Revgear sponsored fighter Roxy “Balboa” Richardson (Hollywood, CA) will fight against Rachel Sahlberge (Denver, CO) at World Championship Muay Thai on February 28, 2009 at the Hollywood Park Casino. #Female MMA #IAMTF Women's Lightweight #Muay Thai #Rachel Sahlberge #Revgear Fighters #Revgear sponsored fighter Roxy “Balboa” Richardson #Roxy Balboa