Kimbo Slice

In 2005, Slice started training in martial arts at the Freestyle Fighting Academy under Marcos Avellan and David Avellan. At first, Slice was training exclusively for illegal street boxing, focusing on bare-knuckle techniques, dirty boxing from the clinch, and elbows—but then he began to develop an interest for MMA.

As an amateur, Slice lost his first and only bout to Jay Ellis by KO in the first round on October 8, 2005, at the 2nd event of the Xtreme Fighting Organization trials.[15]

In 2006, Slice signed to make his professional level MMA debut against former WBO Heavyweight champion and Olympic gold-medalist boxer Ray Mercer at Cage Fury Fighting Championships 5, in Atlantic City on June 23, 2007. Slice was 33 years old facing Mercer, who was 46 years old at the time.

A month prior to the fight, Slice switched camps and was trained by retired MMA fighter Bas Rutten and boxing instructor Randy Khatami at Rutten's school, EliteMMA, in Thousand Oaks, California.[16]

Slice made his MMA debut against Mercer at Cage Fury Fighting Championships 5, in Atlantic City on June 23, 2007. The match was scheduled as a three-round exhibition utilizing all professional rules of MMA combat. Slice defeated Mercer with a guillotine choke at 1:12 into the first round.[17] CFFC V sold 20,000 ppv buys[18] In a post-fight interview, Slice stated that he would like to fight David "Tank" Abbott. Abbott, who was a spectator, stood up from his seat and accepted the call out. One of the matchmakers for CFFC asked Slice for his assurance so that an October 12 bout at Cage Fury Fighting Championships 6 between Slice and "Tank" Abbott could be organized. This event was later canceled due to a promotion dispute. On October 11, 2007, ProElite announced that they had signed Slice to a deal and that he would make his debut on the November 10, 2007 EliteXC.[19] He was originally set to make his professional MMA debut against Mike Bourke, a reformed street fighter, but a shoulder injury from Bourke led him to face Bo Cantrell.[20] Slice defeated Cantrell 19 seconds into the first round by submission due to strikes.

On February 16, 2008, Slice fought Tank Abbott in the main event at EliteXC: Street Certified. He won by KO 43 seconds into the first round due to strikes. At the fight, his weight was announced at an all-time low of 234 lb (106 kg), a far cry from his street fighting days of 280 lb (130 kg). During his ensuing three fights, Slice did not utilize full skills in MMA and relied heavily on striking, punches and elbows, and modified Muay Thai.

On May 31, 2008, Slice fought in the main event of the first ever mixed martial arts event shown on prime time network television, EliteXC: Primetime. Though one of the judges had each fighter winning one of the first two rounds, Slice's opponent James Thompson won both on total points[21][22][23] by repeatedly taking down Slice and grounding and pounding. In the opening seconds of the third round, however, Slice threw a haymaker to Thompson's left ear, which ruptured Thompson's cauliflower. This was soon followed by three unanswered punches to a standing Thompson, which led to a referee stoppage and the controversial win for Slice. Fellow EliteXC competitor Brett Rogers was particularly critical of Slice's victory, calling Slice's performance "garbage" in a post fight interview.[24] Frank Mir was also a critic of Slice, stating in an interview that "every time Kimbo Slice fights, it sets (mixed martial arts) back".[25]

On October 4, 2008, a Kimbo Slice vs. Ken Shamrock fight was supposed to take place at the BankAtlantic Center in Sunrise, Florida as part of CBS' Saturday Night Fights.[26][27] However, Shamrock received a cut to the left eye during a warm-up only hours before the fight was to take place.[28] This left the head of fight operations, Jeremy Lappen, to choose a replacement for the fight. Options were Seth Petruzelli, Aaron Rosa and Frank Shamrock. Slice's team stated they did not want him fighting Frank no matter how much money was offered to them, so Lappen decided that Petruzelli was the best option for the main event. Slice agreed to take the fight after receiving a raise in pay, and took in $500,000.[29] Petruzelli defeated Slice by TKO 14 seconds into the first round of the bout.[30]

Interviewed on Orlando radio show The Monsters in the Morning two days after the fight, Seth Petruzelli said that when they offered him a spot in the main event, EliteXC promoters added monetary incentives to dissuade him from using certain fighting techniques against Slice, in an attempt to protect their relatively unproven Internet star.

The promoters kinda hinted to me and they gave me the money to stand and throw with him, they didn't want me to take him down. Let's just put it that way. It was worth my while to try and stand up punch him.[31]

This added to the controversy surrounding the representation of Slice as a top flight martial artist by CBS and EliteXC.[32] The Florida Department of Business and Professional Regulation started a preliminary investigation on the events surrounding the fight and its outcome.[33]

However, Petruzelli retracted this statement a few hours later, claiming in a follow-up interview with MMA website FiveOuncesofPain.com that his previous comments on The Monsters had been misinterpreted.

What was meant to be said was that I wanted to keep the fight standing for myself because I knew that was what the crowd, the promoters, and everyone wanted to see because that's more exciting than just taking someone to the ground. That was my thing only. I wanted to keep it exciting so I decided to keep it standing. It had nothing to do with anybody else. That was all me.[34]

On October 23, 2008, the Florida Department of Business and Professional Regulation concluded its investigation of the bout and found no wrongdoing.[35] By the end of October 2008, EliteXC was forced to file for bankruptcy.[36] Many in the mixed martial arts community, including Jay Thompson, executive consultant to the company, attributed EliteXC and ProElite's failure due to Slice's loss to Seth Petruzelli.[37]

After Elite Xtreme Combat ceased operations, Dana White stated that if Slice wanted to compete in the Ultimate Fighting Championship he would have to win his way in by competing on The Ultimate Fighter TV show. White went on to say that he might create a show with heavyweights just for Kimbo Slice if he wanted in.[38] That statement became reality on June 1, when Kevin Iole of Yahoo.com stated Slice would participate in The Ultimate Fighter: Heavyweights.

The coaches for the show were Quinton Jackson and Rashad Evans, both former UFC Light Heavyweight Champions.[39] Slice was the number one pick for coach Rampage and the second pick overall. In his first fight of the show, Slice was defeated by Roy Nelson via TKO stoppage in the second round after repeated punches to the head in the crucifix position.[40] The broadcast was the highest rated MMA show in U.S. history with a 3.7 rating. The fight itself had 6 million viewers.[41]

Following defeat in the preliminary round, Slice did not leave the show like some contestants after elimination, continuing to train with the remaining participants, befriending some of them and sharpening his own combat skills, particularly ground fighting and defense. Slice later turned down the opportunity to take Matt Mitrione's place in the quarter-finals after it was revealed that he had arthritis in his knee. Slice brought record breaking views during his time on The Ultimate Fighter, and given his humbleness and apparent potential as he fought and honed his skills, it was decided be would be offered a contract by the UFC promotion regardless of his elimination at the hands of Nelson, albeit a lesser valued one than the coveted six figure deal the winner would receive.

Slice made his official UFC debut at age 35, when he fought Houston Alexander on December 5, 2009, at The Ultimate Fighter: Heavyweights Finale at a catchweight of 215 pounds.[42] In a fight that many thought would not leave the first round, Alexander would instead spend most of the first and third rounds circling Slice tentatively with little engagement. In the second round, however, Slice, dominantly, managed to land punches that visibly hurt Alexander, and even took him down a couple of times including slamming Alexander on his upper body, which very well may have tipped the judges' scorecards in his favor, though Alexander managed to land a leg kick that knocked Slice down. Slice would win the bout by unanimous decision (29–28, 29–28, and 30–27) and Alexander would be cut from the promotion only days later.

On May 8, 2010, Slice made his pay-per-view and official heavyweight debut in his second fight under the UFC banner, at UFC 113 against his fellow Ultimate Fighter veteran Matt Mitrione on the Main Card. He ended up losing in the second round via a TKO.[43] Slice exhibited the same sharpened ground fighting skill he gained from The Ultimate Fighter, landing an explosive takedown early on and was thought to have taken the first round on the judges cards, but Mitrione began to chop down the senior Slice with hard leg kicks that led to him gaining mount.

Following the loss to Mitrione, Dana White stated that it was "probably Kimbo's last fight in the UFC".[44] But he still praised Slice, stating "He's impressed me as a human being and as a fighter, and I like him and the guys who represent him very much. I'm glad to have met Kimbo Slice" and the former street brawler had made it farther in the promotion than he expected.[45] His release from contract was confirmed the following day, alongside welterweight Paul Daley.[46] Slice ended his brief stinted career in the UFC with an Octagon record of 1-1 (1 KO loss), and an overall MMA record of 4–2.[47]

In August 2010, Slice announced his retirement from MMA competition to pursue a career in professional boxing.[48]

On January 16, 2015, nearly five years since his last MMA fight and more than two years of absence from combat sports, Bellator MMA announced that Slice had signed a multi-fight deal.[3] He defeated Ken Shamrock by first-round TKO in his June 19 debut at Bellator 138.[49] Some observers noted the fight appeared to be fixed, like a professional wrestling match.[50][51] Bellator commentator Jimmy Smith accredited the fight looking as it did to Shamrock's lack of technique and durability, and said if it was fixed, Bellator wasn't in on the deal.[52]

On February 19, 2016, at Bellator 149, Slice faced Dada 5000. The duo had a big rivalry between them due to their old street fight legacies they had in Perrine, Florida. In the first round, both fighters gassed out almost immediately, and Slice went on to win an uneventful fight via TKO when Dada collapsed from apparent exhaustion in the third round.[53] Following the bout it was reported that Slice had failed his pre-fight drug test. Lab results found traces of the anabolic steroid nandrolone. He was also found to have an elevated testosterone/epitestosterone (T/E) ratio of 6.4:1, which is above the maximum allowed limit of 4:1. On May 2, 2016, it was revealed that Slice had settled with the Texas Athletic Commission with a fine of $2,500 and a revoking of his license in the state of Texas. The result of the bout has also been changed to a no contest.[54] Despite being widely panned by critics, the fight attracted approximately 2.5 million viewing households, breaking the Bellator record of 2.4 million, set by Kimbo vs Shamrock.[55]

In April 2016, Bellator President Scott Coker announced on ESPN's SportsCenter that Slice would have a rematch against James Thompson in the main event of Bellator 158, which would take place on July 16, 2016, at London's O2 Arena.[56] Slice died of heart failure before this fight could happen.

Slice made his pro boxing debut on August 13, 2011. Slice fought in a four-round headlining attraction against 39-year-old James Wade (0–1) at the Buffalo Run Casino in Miami, Oklahoma.[57] He won the fight via KO at 0:10 in the first round.[58]

On October 15, Slice returned to the boxing ring, defeating Tay Bledsoe (2–3) via KO in the first round.[59] On December 30, he defeated Charles Hackmann (0–1) by unanimous decision, winning three out of four rounds.[60]

Slice had three fights in 2012. He defeated Jesse Porter (3-4)[61] and Howard Jones (5-4)[62] both by first round KO, but the more prominent came in the form of fellow Mixed martial artist, Brian Green (27-17).[63]

Slice fought Green in Missouri, and the bout nearly went the distance. Green took all four rounds on the cards, but in the closing seconds of the final round, Slice landed a left uppercut the dropped and knocked Green out, marking a mild upset.[63] There was controversy and accusations the fight was a fixed and staged event, as Green admitted to wearing 20 pound ankle weights to fool the state commission, and was heavily ridiculed for it was believed he took a dive.[64]

Slice's next fight, the highest profile one of his career, was in Australia on the Anthony Mundine vs Daniel Geale undercard on January 30, 2013.[65] He defeated Shane Tilyard (6–6), former ANBF Queensland champion, by TKO in the second round.[66]

When he announced his intention to move from MMA to boxing, Roy Jones Jr. had said he would like to fight Slice, but that Slice would likely need a number of boxing matches beforehand in order to gain experience and exposure in the sport.[67] Despite Slice having amassing what would have been enough experience on paper, the fight never materialized. Additionally, it was heavily rumored, and Slice apparently was open to the event, that he and Eric "Butterbean" Esch were eying to get into the ring with each other,[68] with Butterbean having even called out Slice early on during his MMA career, having fought in MMA himself, in 2008.[69] This rumored bout also never materialized and Slice ended his stint in professional boxing a record of 7-0 (6 KOs).