[3] He then lost to Joe Schilling by second round technical knockout in Los Angeles, California on December 5, 2012 in a WBC Muaythai US Super Muddleweight (-76 kg/168 lb) title eliminator.

[4][5] He snapped a two-fight losing streak by defeating Douglas Edwards by TKO in round two in a rematch in Primm, Nevada on February 12, 2011.

[6][7] This was followed up with two back-to-back wins in the space of a month in May 2011 when he beat Ken Tran by unanimous decision in Primm[8][9] and Phillip Sidkrunoom by TKO due to low kicks in Thailand.

[10] This earned him a shot at the WBC Muaythai International Middleweight (-72 kg/160 lb) Championship against familiar opponent Remy Bonnel on August 20, 2011.

[22] In March 2012, it was reported that Mulkey had signed with Glory, one of the world's premier kickboxing organizations, to compete in the 2012 Middleweight Slam tournament.