Siala-Mou Siliga, often billed as Mighty Mo is a former American Samoan kickboxer, bare knuckle boxer, boxer and mixed martial artist who competed in the Heavyweight division. At the age of 22, he got his nickname from his former American football coach after the battleship USS Missouri. His K-1 achievements include winning the K-1 World Grand Prix 2004 in Las Vegas II and the K-1 World Grand Prix 2007 in Hawaii tournaments. In mixed martial arts, he has competed for K-1 Hero's, Bellator MMA, DREAM, Road FC and also participated in the Dynamite!! USA and Dynamite!! 2008 events. On September 24, 2016, Siliga won the Road FC Openweight Tournament at Road FC 33 by knocking out Choi Hong-man of South Korea.

SoftBank presents Dynamite!! USA was a mixed martial arts (MMA) event co-promoted by Fighting and Entertainment Group (FEG), the promoters of K-1 kickboxing events and Hero's MMA events, and EliteXC. The event was held on Saturday, June 2, 2007 at the Los Angeles Memorial Coliseum in Los Angeles, California. Mauro Ranallo, Bill Goldberg, and Jay Glazer did commentary.