Strikeforce: Payback was a mixed martial arts event held on October 3, 2008. The event was produced by Strikeforce and took place at the Broomfield Events Center in Broomfield, Colorado. It marks the first time Strikeforce has held an event in Colorado and the main event featured a rematch between Duane Ludwig and Sammy Morgan.

UFC 43: Meltdown was a mixed martial arts event held by the Ultimate Fighting Championship on June 6, 2003, at the Thomas and Mack Center in Las Vegas, Nevada. Headlining the card was the Interim Light Heavyweight Championship match between Randy Couture and Chuck Liddell.

Strikeforce: Four Men Enter, One Man Survives was a mixed martial arts event held at the HP Pavilion in San Jose, California on November 16, 2007. The event was hosted by Strikeforce in conjunction with bodogFight, and was streamed live on Yahoo! Sports. The event held two distinctions in that: 1) it contained the first MMA tournament sanctioned by the California State Athletic Commission and 2) Strikeforce's heavyweight champion was determined during the event in a non-tournament fight.

UFC 45: Revolution was a mixed martial arts event held by the Ultimate Fighting Championship at the Mohegan Sun Casino in Uncasville, Connecticut. This event marked the 10th anniversary of the UFC and to celebrate the anniversary the UFC inaugurated its Hall of Fame, with Royce Gracie and Ken Shamrock as the first inductees.

Strikeforce: Playboy Mansion was a mixed martial arts event promoted by Strikeforce. The event took place on September 29, 2007 at the Playboy Mansion in Los Angeles, California. The invitation-only event drew nearly 1,000 spectators who paid $1000 per ticket. The event was supervised by the California State Athletic Commission. Fights 5 to 12 were streamed live on Yahoo Sports for free.