Mighty Mo made his K-1 debut on February 15, 2004, at "K-1 Burning" event in Japan against Hiraku Hori. He knocked out Hori at 1:22 in 4th round by right hook. After losing in semifinals at his first 8-man tournament in Las Vegas against fellow American Dewey Cooper, Mighty Mo made a huge comeback four months later at the Battle of Bellagio II, winning his first K-1 GP Championship by knocking out Brecht Wallis in 2nd Round at the tournament finals.
After a year off from K-1, he made his comeback on March 4, 2007, at Yokohama, Japan. His opponent was Choi Hong-man (218 cm/7′2″) from Korea who had never been knocked out before on his K-1 career until Mighty Mo (185 cm/6′1″) managed to land his trademark right overhand punch, winning the fight by KO at 0:50 KO in 2nd round. At that time, he held the record for the "Biggest height difference wins (33cm/12.9inches)" resulting in a KO in favor of the shorter in K-1 history. But on December 31, 2007, at the K-1 Dynamite Tournament in Osaka, the record was surpassed by Danish Karate fighter Nicholas Pettas (178 cm/5′10″), who was able to KO the 217 cm/7′1.½″ Korean Kim Young-hyun (39 cm/15.3inches height difference).
In professional Boxing the record stands at 38 cm/14.9inches height difference when Randy Davis (1.80m/5′11″) knocked out Tom Payne (2.18m/7′2″) in 1985.
On June 23, 2007, Mighty Mo lost to defending K-1 Super Heavyweight Champion Semmy Schilt by unanimous decision at the K-1 World GP in Amsterdam. Semmy used his reach to keep Mighty Mo at bay, and Mo was unable to get in close enough to land his devastating overhand right. Rumors surfaced that Mo was nursing a knee and hand injuries from his previous fights. He had fought 7 times in the last 4 months.[7]
At the K-1 Final Eliminations 2007 on September 29, he faced Choi Hong-man again and lost by unanimous decision. During the fight, he was kicked in the groin and was inexplicably ruled a knockdown by the referee. He was quoted in the post-fight interview: "I feel I was robbed. I should have won. There was a lot of favoritism here. He must have picked up a new technique-a kick below the belt. So next time I'll wear a thicker cup. And next time I want to fight somewhere else."
In his next three fights he went 1-2, losing to Paul Slowinski and Keijiro Maeda before defeating Justice Smith on August 9, 2008.
Mighty Mo was knocked out by Russian Sergei Kharitonov at the United Glory World Series Finals in Moscow on May 28, 2011.
As of October 2011 Mighty Mo is currently on a six fight losing streak in Kickboxing, all but one by knockout.
He was next set to face Rick Roufus in Las Vegas on October 22, 2011.[9] However, he was not medically cleared to compete.
He rematched Raul Cătinaş, the last man he was able to defeat, in a non-tournament bout at the SuperKombat World Grand Prix 2012 Final in Bucharest, Romania on December 22, 2012, and lost on a unanimous decision.[10][11]
Mixed martial arts career
Mo made his professional MMA debut in October 2003. He won his first three MMA fights all by knockout over a period of three and a half years.
Dynamite!!
Mo was originally supposed to face Choi Mu-bae in a MMA match at K-1 Dynamite!! USA on June 2 in Los Angeles, California. But Choi was replaced in the last minute by Ruben "Warpath" Villareal.[12] Mighty Mo dominated Villareal, forcing the referee, Herb Dean, to stop the fight at 1:33 of the first round.
In 2009, Mo signed with the DREAM promotion in Japan. He was set to fight Mirko "Cro Cop" Filipović at DREAM 10 but Cro Cop pulled out after re-signing with the UFC.
Mo instead made his debut against Josh Barnett at DREAM 13 on March 21, 2010, and lost via submission in the first round.
Bellator MMA
In 2013, Mo refocused his efforts on MMA and signed with Bellator MMA. He made his debut in September 2013 at Bellator 100 where he defeated Dan Charles by TKO. Mo returned just over a month later at Bellator 106 where he defeated Ron Sparks by submission.
Mo was released from the organization on August 25, 2014.[13]
Road FC
On October 9, 2015, at Road FC 026 in Seoul, South Korea, Mo defeated Choi Mu-bae by 1st-round KO in 37 seconds. On December 26 at Road FC 027 in Shanghai, China, Mo defeated Choi Mu-bae by Technical Knockout at the 3:46 mark of round 1, in a rematch of their Road FC 26 match up.
On April 16, 2016, at Road FC 030 in Beijing, China, Mo defeated Hyun-man Myung by neck crank in round 3 to win Openweight tournament semi-finals. On September 24 at Road FC 033 in Seoul, South Korea, Mo defeated Choi Hong-man by knockout in round 4 to win the Road FC Openweight Championship. On September 25 Mo signed an exclusive contract with the Road FC. On December 10 at Road FC 035 in Seoul, South Korea, Mo retained his Openweight Title with a first-round knockout of Carlos Toyota. Mo next faced Dong-gook Kang at Road FC 040, winning the fight via technical knockout in the second round. Mo fought Gilbert Yvel at Road FC 47, losing the fight via armbar submission in the first round.
Bare-Knuckle Boxing
Mighty Mo entered the Valor Bare Knuckle 1 Heavyweight Tournament, VBK:1; this was the debut event for Ken Shamrock's newly founded bare-knuckle boxing organization. Mighty Mo defeated Sokoudjou by 3rd round TKO and entered the finals against Mark Godbeer. Unlike Godbeer, Mighty Mo had not been able to quickly defeat his prior opponent (Godbeer quickly knocked out his first opponent in less than a minute). He lost via TKO after he was unable to get up in time to answer the 10 count[14]
Fighting Style
Mighty Mo is largely a stand-up fighter known for his strong striking power; he specifically possesses a powerful overhand-right and has used it to knock out several of his opponents.