Derrick Mehmen

Strikeforce Challengers 18: Gurgel vs. Duarte was a mixed martial arts event held by the Strikeforce. The eighteenth Challengers episode took place on August 12, 2011 at Palms Casino Resort in Las Vegas, Nevada.

On May 15, 2013, WSOF announced a 4 man tournament to crown an Inaugural Middleweight Champion that will take place at WSOF 5. The participants announced are as followed: Jesse Taylor, Elvis Mutapcic, David Branch & Danillo Villefort

World Series of Fighting's return to Canadian soil just became more of a must-see event as the organization is excited to announce the entire fight card for the live NBC Sports Network (NBCSN) televised event at the EXPO Centre in Edmonton, Alberta, Canada on Saturday, Oct. 11, including the inaugural World Series of Fighting heavyweight championship bout and co-main event between fast-rising stars Smealinho "The Prince" Rama (8-1) of Calgary, Alberta Canada and Derrick "Caveman" Mehmen (18-5) of Cedar Rapids, Iowa. In the highly-anticipated main event, superstars Jake Shields (29-7-1) of San Francisco, Calif. and Ryan "The Real Deal" Ford (22-4) of Edmonton will square off in a welterweight (170 pounds) matchup.

Strikeforce Heavyweight Grand Prix Finals: Barnett vs. Cormier (aka Strikeforce: Barnett vs. Cormier) was a mixed martial arts event held by Strikeforce that served as the Heavyweight Tournament Finals. It took place on May 19, 2012 at the HP Pavilion in San Jose, California.