In April 2013, Conor McGregor made his UFC debut.
There were people who believed McGregor could become a star in UFC, but not many people predicted quite how meteoric his rise would be. The only man to hold two World titles simultaneously in company history, 'The Notorious One' has become the biggest draw in MMA history.
Racking up a 9-1 record in UFC with 8 wins via KO/TKO, McGregor blitzed through the featherweight division en route to taking the title there, before going up in weight. Less than a year later he added the lightweight title to his collection, living up to a promise he repeatedly made of becoming a two weight World champion.
With the super-fight against Floyd Mayweather coming up on 26 August, it's certainly possible that we'll never see McGregor in the octagon again. His transition to boxing is likely to be one and done, but that doesn't necessarily mean he'll be back in UFC. With a potential $100,000,000 payday coming his way, McGregor may just retire young and rich.
While his UFC future may be in doubt, his past is something to celebrate. While Conor didn't always have it his own way in the cage - even in victory - he put in some incredible performances against some top level fighters.
Let's rank them, shall we?