Conor McGregor Calls out Floyd Mayweather with Boxing Photo: 'Sign Your End'

UFC lightweight champion Conor McGregor has reportedly agreed to his end of a contract that would pit him against Floyd Mayweather in the boxing ring.

Now, he wants Money to sign his end.

On Sunday, the Irish southpaw posted a post-workout photo in boxing gear calling out his 40-year-old potential opponent.

McGregor told Mayweather to agree, "or you are just a mouth."

The Notorious taunted the 49-0 boxer earlier in the week with a picture of his newborn son, Conor Jr., sitting with his UFC belts:

[Twitter]