He made his expert presentation in 2008, and won his initial two sessions via technical knockout.

He made his UFC debut in 2013, and procured the Knockout of the Night in his most memorable battle.

In August 2017, he was crushed in his boxing debut by Floyd Mayweather Jr. In 2018, he sent off his own Irish bourbon brand called Appropriate No. Twelve after the local he experienced childhood in.

He was brought into the world in Dublin, Ireland and raised close by his sisters Aoife and Erin.

He has been in a drawn out relationship with Dee Devlin. They've been locked in starting around 2020. 

He and Dee invited a child named Conor Jr. in 2017, a subsequent youngster named Croia in 2019 and a third named Rían in May 2021.

In June 2023, they reported they were anticipating a fourth kid.

He has a well established competition with Nate Diaz, who crushed McGregor in their most memorable session by accommodation