Proudly known as Notorious, Ireland’s most famous fighter, Conor McGregor, gives his take on mental warfare.

Donald "Cowboy" Cerrone is on the hunt for a lightweight title shot, willing to fight at anytime. Now the Cowboy is backing up his words by taking a short notice fight against the former lightweight champion, Benson Henderson, at Fight Night Boston. Can Cerrone keep his win streak going on such short notice?

Conor McGregor's skills are put to the test as his speed, accuracy, and movements are measured at a professional sports lab. The outcome? Conor is not only elite, he is elite compared to the elite!. Watch Conor put his moves to the test against Dennis Siver this Saturday at Fight Night Boston on FOX Sports 1.

Conor McGregor's skills are put to the test as his speed, accuracy, and movements are measured at a professional sports lab. The outcome? Conor is not only elite, he is elite compared to the elite!. Watch Conor put his moves to the test against Dennis Siver this Saturday at Fight Night Boston on FOX Sports 1.

The Notorious" Conor McGregor is on a mission to take over. See what sets this Irishman apart. Watch McGregor vs Siver on FOX Sports 1, LIVE from Boston, January 18 at 10pm ET.

The fighting Irish fans erupt as Conor McGregor steps into the Octagon to face Dustin Poirier at UFC 178. Don't miss what the Conor McGregor effect is all about by catching his upcoming fight this Saturday against Dennis Siver at Fight Night Boston.

Just days after collecting a victory at UFC 182, Donald "Cowboy" Cerrone signed on to fight Benson Henderson just two weeks later in Boston to fill in for injured Eddie Alvarez. He spoke to the media on a conference call about the fight.

Just days after collecting a victory at UFC 182, Donald "Cowboy" Cerrone signed on to fight Benson Henderson just two weeks later in Boston to fill in for injured Eddie Alvarez. He spoke to the media on a conference call about the fight.

Racing fan and UFC lightweight Donald “Cowboy” Cerrone experiences the 2014 Daytona 500 courtesy of NASCAR driver Kevin Harvick.

Travel to Ireland to meet the rising star - Conor McGregor. In Dublin, the brash young Irishman known as Notorious displays how he has captured his country’s heart, with dynamic finishing skills, an outsized personality and a penchant for showmanship.