Conor McGregor, The Irish warrior.

Conor McGregor is a retired Irish mixed martial artist and professional boxer who is widely considered one of the greatest fighters in the history of both sports. McGregor rose to prominence in the Ultimate Fighting Championship (UFC), where he became the first fighter in the organization's history to hold titles in two different weight classes simultaneously. He later made the transition to professional boxing, where he famously fought Floyd Mayweather Jr. in one of the highest-grossing boxing matches of all time.

Born in Dublin, Ireland in 1988, McGregor developed an interest in martial arts at a young age. He began training in boxing and Brazilian jiu-jitsu, and eventually transitioned to mixed martial arts (MMA). McGregor made his professional MMA debut in 2008, and quickly gained a reputation as a formidable striker with excellent footwork and movement.

In 2013, McGregor signed with the UFC and made his debut in the organization at UFC on Fuel TV 9. He quickly became one of the organization's top stars, winning his first six fights and earning a shot at the featherweight title. In 2015, McGregor became the featherweight champion by defeating José Aldo at UFC 194, and he followed this up by winning the lightweight title in 2016, becoming the first fighter in UFC history to hold titles in two different weight classes simultaneously.

In addition to his success in the UFC, McGregor also made the transition to professional boxing in 2017. He faced off against Floyd Mayweather Jr. in a highly anticipated bout that was dubbed "The Money Fight." The fight generated over $400 million in revenue, making it one of the highest-grossing boxing matches in history.

Despite his impressive record and accomplishments, McGregor has also faced controversy and criticism throughout his career. He has faced criticism for his brash and often controversial trash-talking, and has faced legal issues related to his behavior outside of the ring.

In 2020, McGregor announced his retirement from MMA, but he has not ruled out the possibility of returning to the sport at some point in the future. Regardless of whether he decides to return to the ring, McGregor's impact on the world of combat sports is undeniable, and he will always be remembered as one of the greatest fighters of all time.