日高郁人
Shelley and Sabin first started teaming in Pro Wrestling Zero1-Max in 2006, winning the Zero-1 Max International Lightweight Tag Team Championship from Minoru Fujita and Ikuto Hidaka on August 25. They held the title for almost two years before dropping them back to Fujita and his new partner Takuya Sugawara. In the United States, the pair had short runs in the independent promotions Pro Wrestling Guerrilla and Ring of Honor under the names Motor City Machine Guns and Murder City Machine Guns, respectively. The team's work for other companies eventually ended when their main employer, Total Nonstop Action Wrestling (TNA), requested their wrestlers stop taking bookings with certain independent promotions.