Kim made his mixed martial arts debut at the Hero's 1 event on March 26, 2005, against kickboxer and mixed martial artist Bob Sapp. Despite a promising start wherein Kim negated Sapp's charging attacks and dealt him a facial laceration that necessitated a medical time-out, Sapp struck Kim in the face immediately after the match resumed and knocked him out.ボブ・サップ vs キム・ミンス hero-s.com At Hero's 2 in the following July, Kim met kickboxer Ray Sefo in a longer but ultimately similar fight wherein Sefo first stunned Kim with strikes before finishing him with a kick to the head.
