Brock Lesnar signed with Hero's, a Japanese mixed martial arts promotion.
Brock Lesnar . In 2006 , Lesnar pursued a career in mixed martial arts ( MMA ) , as he signed with Hero 's and won his first fight , against Min-Soo Kim , in June 2007 . Hero 's was a Japanese mixed martial arts promotion operated by Fighting and Entertainment Group , the parent entity behind kickboxing organization K-1 .