Mac Danzig (born January 2, 1980) is an American mixed martial artist, who competed as a lightweight in several MMA promotions, most notably the Ultimate Fighting Championship.

Danzig, of German and Scots-Irish descent, grew up in the greater Pittsburgh area before moving to Los Angeles to pursue his career.

In the past, Danzig was known for his association with R1 fight team (formerly RAW) and had been a student of Iowa wrestling standout Rico Chiapparelli and MMA fighter Frank Trigg.

Since then he trained boxing extensively at both the Wild Card gym in Hollywood, California under Freddie Roach assistant Justin Fortune, and also Gil Martinez in Las Vegas, Nevada during his time on the Extreme Couture MMA Team.

After defeating Royce Gracie black belt Buddy Clinton on August 4, 2006, Danzig increased his winning streak to 12 in a row with a unanimous decision victory over Miletich fighter John Mahlow on September 29 in Calgary, Alberta Canada.

He then defeated Kolosci (who had replaced an injured Matt Arroyo) again, and moved on to the finals where he submitted Tom Speer in the 1st round to become TUF Season 6 winner.

Danzig made his official UFC debut on December 8, 2007, where he won The Ultimate Fighter 6, defeating Tom Speer in the finals via rear naked choke at 2:01 of the first round.

Before the fight, Danzig stated his intention to drop down in weight class to lightweight whether he won or lost, citing the size difference between himself and most of the other UFC welterweights.

[5] A rematch with Matt Wiman took place on October 1, 2011, at UFC on Versus 6[6] with Danzig losing via unanimous decision in a bout that earned Fight of the Night honors.

[citation needed] On June 17, 2017, it was announced that Danzig would make his MMA return on August 5, 2017, to face WSOF vet Joe Condon for the CFL Junior Welterweight Championship.