McGregor tweets photo hyping rumored fight vs. Mayweather

Conor McGregor is nothing if not an exquisite troll.

The UFC champion fanned the flames of a rumored fight against retired boxing superstar Floyd Mayweather Jr. by sharing a poster for the event on his Twitter account early Sunday:

Of course, it's just a fan-made poster and it remains exceptionally unlikely the two will ever square off in the ring/Octagon. But that won't stop McGregor from an opportunity to add to the hype and mystique surrounding his persona.