7 Wins At Featherweight 

McGregor spent most of his UFC career at 145 pounds, a weight division where the 37-year-old secured seven straight wins, six by knockout, to remain unbeaten in that weight class. At UFC 189, he won the interim UFC featherweight title and went on to unify the division against Aldo five months later to close out his 2015 campaign.

Joe Rogan Interviews Conor McGregor And Max Holloway Ahead Of UFC 329

First Fighter To Hold Two UFC Titles Simultaneously 

It has become more common to see double champions in the UFC, but it all started with McGregor, who showed people it was possible to hold belts in two different divisions simultaneously. After his win over Aldo, McGregor moved up to welterweight to face Nate Diaz twice, going 1-1 while picking up Fight of the Night bonuses in each bout.

Then, in November 2016, McGregor faced Eddie Alvarez in New York City, where the featherweight champion stopped Alvarez in the second round to claim a second belt at 155 pounds.