All Boxers American professional mixed martial artist:

Nathan Donald Diaz 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 19 July 2016, Diaz is #4 in official UFC lightweight rankings.

Robert Glenn “Robbie” Lawler is an American professional mixed martial artist and former UFC Welterweight Champion. A professional competitor since 2001, Lawler is also a former EliteXC Middleweight Champion, and has formerly competed in Strikeforce, PRIDE, and the IFL. He is currently #11 in official UFC pound-for-pound rankings and ranked as the #1 welterweight and #6 pound-for-pound fighter in the world by Sherdog.