Lister will debut versus former UFC title challenger Thales Leites (14-3) at MFC 23: Unstoppable on Friday at River Cree Resort and Casino outside of Edmonton December 4.

“This is an outstanding matchup and I am particularly pleased that both Dean and Thales agreed to fight each other so quickly – no discussion, no delays.  Just signed, sealed and delivered,” said MFC President Mark Pavelich.

Lister lost a unanimous decision to “Thunder” Yushin Okami (23-4) at UFC 92 in Las Vegas December 27, 2008.  He went 4-2 in the UFC from 2006-2008.

Leites lost a disappointing split decision to “Legionarius” Alessio Sakara (14 -7) at UFC 101 in Philadelphia August 8, just one fight removed from losing a unanimous decision to Fighters.com and UFC Middleweight Champion “Spider” Anderson Silva (25-4) at UFC 97 in Montreal April 18.

Lister’s record includes a first-round submission of Leites’s last opponent, Sakara, at UFC 60 in Los Angeles in May 2006.

Both UFC title contenders will compete in the -87.9kg division, along with “Toquinho” Rousimar Palhares (11-3). Sengoku judoka Kazuhiro Nakamura (13-9) and DREAM welterweight Andre Galvao (3-0).

UFC welterweight champ “Rush” Georges St. Pierre (19-2) will compete in the -76.9kg division, along with the UFC’s “Zenko” Yoshiyuki Yoshida (11-3), Japanese free agent “K-Taro” Keita Nakamura (15-4-2), and Brazilian free agent “Uirapuru” Marcelo Azevedo (3-5).

In the -98.9kg division, Strikeforce light heavyweight “Babalu” Renato Sobral (32-9), free agent “Brazilian Tiger” Ricardo Arona (13-5), The Ultimate Fighter 8 contestant “Pezao” Vinicius Magalhães (3-5), former UFC and PRIDE fighter “Boogey Man” Dean Lister (11-6), The Pit’s “Brazilian Pit Bull” Glover Teixeira (7-2), Brazilian heavyweight free agent “Pe De Pano” Marcio Cruz (6-2), and Aussie light heavyweight “Hippo” Anthony Perosh (6-4).

Strikeforce heavyweight contender “Vai Cavalo” Fabricio Werdum (12-4-1) and American free agent “Snowman” Jeff Monson (27-8) highlight the +99kg division. Former IFL heavyweight title challenger Antoine Jaoude (8-3) and M-1 Global heavyweight Rogent Lloret (6-1) will also compete in the highest weight divsion.

In the lowest weight division, -65.9kg, WEC featherweight contender “Big Frog” Jeff Curran (31-12-1) and WEC bantamweight contender Rani Yahya (14-3) will compete with SHOOTO vets “Iron” Hiroshi Nakamura (4-3-4) and “Finisher” Baret Yoshida (5-6-1).

Every division will also include grapplers who don’t compete in MMA.

Every other year, the ADCC creates the most interesting moments and exciting matchups in submission grappling. Always a highlight, the absolute division pits grapplers of all weight classes against each other to crown an absolute champ. Past absolute division matchups include DREAM welterweight “Mach” Hayato Sakurai (35-10) versus former UFC heavyweight champion “Suave” Ricco Rodriguez (32-8-3) and DREAM lightweight “Tobikan Judan” Shinya Aoki (17-4) versus Sengoku heavyweight Roger Gracie (2-0).

Emirati Sheik Tahnoon Bin Zayed Al Nahyan and his BJJ instructor Nelson Monteiro created the event that has become the gold standard in submission grappling in 1998 and in 2003 the tournament began touring to locations outside the UAE.

The grapplers will compete at Pavello Olimpic de Badalona in Barcelona beginning at 11:00 AM on 26 September. Tickets can be purchased at Ticketmaster.

Fighters.com’s sixth-ranked middleweight

Okami is coming off two consectutive wins.  His last fight was in March, when he KO’d the late Evan Tanner (32-8-0) in the second round.

Okami was expected to rematch with Middleweight Champion “Spider” Anderson Silva (22-4) for the title but injured his hand during training.

Lister also won his last two fights, most recently submitting “Gumby” Jeremy Horn (80-18-5) with a first-round guillotine in June.

The future shines brilliantly for The Ultimate Fighter’s newest blast into the mainstream consciousness, Amir Sadollah (1-0).

In his professional debut, Sadollah tapped “Doberman” CB Dollaway (6-1) in an armbar at 3:02 of round one to win the seventh season of the popular SpikeTV reality show contest.

“Nightmare” Diego Sanchez (19-2), one of the two original Ultimate Fighters, looked physically fitter than ever in his third-round TKO of American Top Team’s Luigi Fioravanti (12-4) at 4:07.

After back-to-back “embarrasing” losses, “Spyder” Kendall Grove (9-5), TUF 3 champion, recaptured past glory in a three-round split decision over former UFC titlist Evan Tanner (32-8).

The likeable young TUF walk-on from Virginia, Sadollah, versus the cocky All-American favorite, Dollaway, was a rematch of an exhibition fight fought on the final episode of last season’s The Ultimate Fighter.

Saturday’s finish was almost a replay of that fight’s end.

But, unlike the first fight, Dollaway made haste taking the samboist to his back and pounding him, opening a shallow cut on Sadollah’s forehead.

Sadollah flailed for position, eventually sucking up the “Doberman’s” left paw and swinging his legs over Dollaway’s head to secure the armbar.

Dollaway stood and remained standing as Sadollah worked the technique.

Finally, Dollaway ended the fight with a single tap causing referee Herb Dean to step in.

Sadollah leapt to his feet and threw his arms in the air.

Dollaway threw his hands out to his sides, complaining about the stoppage; but, replays clearly showed Dollaway tapping.

And, as “Kimbo Slice” Kevin Ferguson (3-0) famously said, Dollaway exhibited in his immature and ridiculous post-fight protest: “Tapping is for bitches.”

“Nightmare” Sanchez showed off a leaner physique and tighter striking game versus a pudgy and lethargic Fioravanti.

In his southpaw stance, Sanchez stalked with his right lead extended and left fist cocked, both of which he used to tag Fiorivanti, who was hesitant to engage on his feet or on the mat.

When Sanchez was able to down Fioravanti, “Nightmare’s” trademark G’n'P dominated.

But, it was Sanchez’s refurbed striking game, highlighted by a roundhouse kick, that won the fight.

In the third round, Sanchez snapped a left kick to Fioravanti’s head, sending Fioravanti backpedaling.  Sanchez followed with a flying knee flush to Fioravanti’s jaw before pounding out the stoppage with his fists.

It was do or die for both Grove and Tanner in the main event, both fighters coming off of knockout losses and at career lows.

However, 6’6″ Grove was just too physical for the former champion, Tanner.

At range, Grove launched long rights that split Tanner’s guard.

But, most of the fight was fought in the clinch, with Tanner, sporting a full beard, resembling a homeless mugger assaulting the Hawaiian for change.

Grove laid on Tanner, wearing Tanner down, while Grove split open Tanner’s head with elbows and peppered Tanner’s body with knees.

The judges ruled it a split decision “W” for Grove by scores of 30-26 twice for Grove and 29-28 once for Tanner; but, Al Lefkowitz, who scored the fight for Tanner, couldn’t have even been in the arena.

Fighters.com scored it 30-27 for Grove.

On the undercard, “McLovin” Dustin Hazelett (11-4) tapped “People’s Champion” Josh Burkman (9-6) in an armbar at 4:46 of round two.

Hazelett won “Submission of the Night”.

Lightweight brawler “King” Spencer Fisher (21-4) ground out a unanimous decision over fellow Iowan Jeremy Stephens (13-3).

TUF 7 contestant Matt Riddle (1-0) won his pro debut with a unanimous decision over Dante Rivera (10-3).

Middleweight Andrew McFedries (7-3) overwhelmed “Beastman” Marvin Eastman (15-8-1) from the bell to score a quick TKO at 1:08 of round one.

In a rematch from 2006, TUF 7 contestant Matt Brown (7-6) TKO’d TUF 6 “No Regard” Matt Arroyo (3-2) at 3:40 of round two.

Veteran “Boogieman” Dean Lister (11-5) submitted über-veteran “Gumby” Jeremy Horn (79-18-5) in a first-round guillotine choke at 3:52.

Similarly, Rob Kimmons (21-3) tapped Rob Yundt (6-2) in a first-round guillotine choke at 3:58.

With over 100 fights on his official record, “Gumby” Jeremy Horn (79-17-5) is one of the most prolific mixed martial artists of all time.

In 2003, “Boogieman” Dean Lister (10-5) won the Abu Dhabi Combat Club Absolute Division championship by submitting “Cacareco” Alexandre Ferreira (16-5).

The two mixed martial artists will face-off in the Octagon at the TUF 7 finale.

Horn returned to the UFC last February, tapping out in guillotine choke to Nathan Marquardt (26-7-2).

Lister comes off a unanimous decision “W” over Jordan Radev (11-3) last December.