Which UFC fighter is known as 'The Diamond'?

The UFC fighter known as “The Diamond” is Dustin Poirier. The Louisiana-born fighter used the nickname throughout a long career in the UFC’s featherweight and lightweight divisions.

Poirier was born in Lafayette, Louisiana, on January 19, 1989. He turned professional in 2009 and joined the UFC in 2011, initially competing at featherweight before establishing himself as a major lightweight contender. His nickname became closely associated with his toughness, pressure-heavy boxing, and willingness to fight through difficult exchanges.

Poirier won the interim UFC lightweight championship in 2019 by defeating Max Holloway at UFC 236. He later challenged for the undisputed title and fought Conor McGregor three times, winning their second and third meetings. He also shared notable rivalries with Justin Gaethje and Eddie Alvarez.

“The Diamond” is sometimes confused with “The Diamond Chin,” a phrase used to describe his durability, but the standard UFC nickname is simply “The Diamond.” Nate Diaz, Max Holloway, and Justin Gaethje have different nicknames.