Chris Haseman had his debut in mixed martial arts outside the promotion fighting Vale Tudo exponent Murilo Bustamante in Martial Arts Reality Superfighting.
10 Facts About Chris Haseman
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Chris Haseman then participated in a February 1998 RINGS Holland event, where he fought Kickboxing and Sambo expert Valentijn Overeem to a decision that eventually went to the latter.
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Chris Haseman eventually was chosen to participate in RINGS's first world mixed martial arts tournament, King of Kings 1999.
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Chris Haseman controlled the first round, executing repeated armlock attempts on a defensive Kohsaka, but the Australian was unable to finish him, and this carried to the second one, where Kohsaka took over the grappling exchanges.
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The match ended with Chris Haseman defending a Guillotine Choke attempt, and it saw the judges eventually awarded the split decision to Kohsaka.
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Chris Haseman returned at the next edition of King of Kings, being pitted first against Carlson Gracie trainee Carlos Barreto, who outweighed him by 30 pounds.
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Chris Haseman next faced a professional wrestler Yoshihisa Yamamoto, but the match turned into an upset when the latter, who had been consistently dominated except by an armbar attempt, hit several glancing leg kicks that damaged Chris Haseman's leg.
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Chris Haseman later competed at the RINGS 2001 Middleweight Championship Tournament, where he choked out famous ADCC competitor Alexandre "Cacareco" Ferreira before falling to Gustavo Machado.
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Chris Haseman later competed against Evan Tanner and retired after losing to Canadian Bill Mahood in Spartan Reality Fight series 9 in 2004.
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Chris Haseman was scheduled to return to the octagon in 2010 for a rematch against Elvis Sinosic at UFC 110, the first UFC event to be held in Australia.