Question: Joseph Edward Lauzon and Nate Diaz are both American mixed martial artists for what profession? 

Context paragraphs:
Jon Jones: Jonathan Dwight Jones (born July 19, 1987) is an American mixed martial artist, who is a three-time Light Heavyweight Champion of the Ultimate Fighting Championship (UFC), having won the title in 2011 and 2017, in addition to the interim title in 2016.  Widely regarded as one of the greatest mixed martial artists of all time, Jones was ranked number one in the world during his championship reign and currently has the longest active winning streak in the UFC.

Joe Lauzon: Joseph Edward Lauzon Jr. (born May 22, 1984) is an American mixed martial artist competing in the UFC's Lightweight division.  He is tied with Nate Diaz as having the most post-fight bonus awards in UFC history.  Joe's younger brother, Dan Lauzon, is also a mixed martial artist.

List of undefeated mixed martial artists: This list of undefeated mixed martial artists excludes mixed martial artists with less than 3 wins.

Nick Diaz: Nicholas Robert "Nick" Diaz (born August 2, 1983) is an American professional mixed martial artist who is currently signed with the Ultimate Fighting Championship (UFC).  Since beginning his career in 2001, Diaz has competed in UFC, PRIDE, Strikeforce, EliteXC, World Extreme Cagefighting (WEC), DREAM, and Shooto.  He is a former welterweight champion in Strikeforce and WEC, and is the older brother of Nate Diaz.

Daniel Cormier: Daniel Ryan Cormier (born March 20, 1979) is an American mixed martial artist and former Olympic wrestler.  He is the current UFC Light Heavyweight Champion, and is ranked as the sixth best pound-for-pound fighter in the UFC.  Cormier was also the Strikeforce Heavyweight Grand Prix Champion.  He is considered by many to be one of the greatest mixed martial artists of all time.

WEC 24: WEC 24: Full Force was a mixed martial arts event held on October 12, 2006.  "WEC 24"'s main event was a championship fight for the WEC Lightweight Title between champion Hermes Franca and challenger Nate Diaz.

Joe Proctor: Joseph Edward Proctor (born August 10, 1985) is an American mixed martial artist formly competed in the lightweight division of the Ultimate Fighting Championship.  Proctor was a competitor on "".

Nate Diaz: Nathan Donald "Nate" Diaz (born April 16, 1985) is an American professional mixed martial artist currently competing for the Ultimate Fighting Championship (UFC).  He was the winner of "The Ultimate Fighter 5".  Diaz is the younger brother of former Strikeforce Welterweight Champion and WEC Welterweight Champion, Nick Diaz.  Prior to signing with the UFC, Diaz competed in World Extreme Cagefighting, Strikeforce, and Pancrase.  As of June 6th 2017, Diaz is #8 in official UFC lightweight rankings.

WEC 12: WEC 12: Halloween Fury 3 was a mixed martial arts event promoted by World Extreme Cagefighting on October 21st, 2004 at the Tachi Palace Hotel & Casino in Lemoore, California.  The card featured many future superstars such as Jason "The Punisher" Lambert, Nate Diaz, Brad Imes, Chris "Lights Out" Lytle, "The Sandman" James Irvin, Joe "Diesel" Riggs, Chael Sonnen, and MMA legend "Mr. International" Shonie Carter.  The main event saw Doug Marshall take on Carlos Garcia.

Dan Lauzon: Daniel James Lauzon (born March 30, 1988) is an American mixed martial artist currently competing in the World Series of Fighting's Lightweight division, and has also formerly competed in the UFC and Affliction.  He is the younger brother of fellow MMA fighter Joe Lauzon.

Supporting paragraphs: Joe Lauzon Nate Diaz
Answer: UFC