Conor McGregor

The biggest box office in UFC history

Conor McGregor is the highest-grossing pay-per-view attraction in UFC history. His pay-per-view bouts — UFC 194 (13-second KO of José Aldo), UFC 196 (loss to Nate Diaz), UFC 202 (Diaz rematch decision), UFC 205 (KO of Eddie Alvarez for the lightweight title), UFC 229 (submission loss to Khabib), UFC 246 (40-second KO of Donald Cerrone), UFC 257 (KO loss to Dustin Poirier), and UFC 264 (TKO loss via leg break to Poirier) — produced cumulative revenue exceeding $1.5 billion across the UFC and Mayweather boxing crossover.

His record stands at 22-6 with the lone career-defining wins coming during the 2014-2016 stretch that culminated in the simultaneous featherweight and lightweight UFC titles.

The SBG Ireland foundation

McGregor trained from his teenage years at Straight Blast Gym Ireland in Dublin under coach John Kavanagh — the first BJJ black belt in Ireland and the foundational figure of European MMA coaching. The technical foundation that Kavanagh developed with McGregor was unusual: precision left-hand striking, karate-influenced distance management, and the willingness to commit to single-shot offense in any range.

The 2015-2016 peak

The 13-second KO of José Aldo at UFC 194 in December 2015 (the fastest title-fight finish in UFC history at the time) was the moment McGregor became the dominant box-office figure in MMA. The follow-up 2016 stretch — loss to Nate Diaz at UFC 196 (the welterweight short-notice bout where Diaz submitted him), decision win in the rematch at UFC 202, and the KO of Eddie Alvarez at UFC 205 to win the lightweight title and become the first simultaneous two-division UFC champion — produced one of the most accelerated championship runs in UFC history.

The Khabib loss and the public meltdown

The October 2018 UFC 229 loss to Khabib Nurmagomedov (submission via rear-naked-choke variant in round 4) was the cleanest demonstration of stylistic mismatch in UFC title-fight history. Khabib's wrestling and ground-and-pound exposed every limit in McGregor's grappling defense.

The post-fight in-cage brawl — Khabib leaping the cage to attack Dillon Danis in McGregor's corner — produced suspensions and a cultural narrative that has defined the McGregor-Khabib rivalry ever since.

The Floyd Mayweather boxing match

The August 2017 Mayweather boxing crossover bout was the second-highest-grossing combat sports event of all time (4.3 million PPV buys, ~$600 million revenue). McGregor lost by TKO in round 10 but performed better than the casual fan would have predicted — winning early rounds on technical aggression before Mayweather's defensive boxing closed the gap in the later rounds.

The boxing crossover validated the cross-discipline event model that the UFC and McGregor's management have continued to explore.

The Poirier trilogy and the leg break

The Dustin Poirier rematch at UFC 257 in January 2021 ended McGregor's competitive prime — Poirier KO'd him in round 2 with calf-kick-accumulated damage and a clean right hand counter. The trilogy bout at UFC 264 in July 2021 ended with McGregor's tibia and fibula breaking against a Poirier check kick at the close of round 1 — the same type of injury that ended Anderson Silva's competitive prime at UFC 168.

The injury required surgery, an extended rehab, and a 2024 return that has been delayed multiple times. As of mid-2025, McGregor has not fought since the UFC 264 injury.

The legacy

McGregor's technical case — the 13-second Aldo KO, the 47-second Cerrone KO, the lightweight title win over Eddie Alvarez — is real but limited compared to the longer-reigning champions in his weight classes. His commercial and cultural impact is unmatched. The UFC's mainstream cultural breakthrough in 2014-2016 was largely his doing, and the post-McGregor era of the UFC has not produced an equivalent box-office figure.

The McGregor brand — the Proper No. Twelve whiskey, the McGregor Sports & Entertainment apparel, the Forbes-listed sports earnings — extends well beyond the cage and has set the template for modern fighter brand-building.