Marcio Jose Sanchez/Associated Press

Draymond Green is not a Conor McGregor fan.

The Golden State Warriors forward responded to a photo of McGregor in a Warriors jersey by writing on Instagram, "We rocking with Floyd bro not you...take that off bruh."

McGregor responded to Green in the comments, saying of the No. 23 jersey: "That's C.J Watson mate. I don't know who the f--k you are. No disrespect tho kid, keep hustling and stay in school."

He added: "Now ask yourself why I'm rocking C.J. when I don't know or give a f--k about basketball. I dribble heads off the floor. Not a ball. This is no game here kid."

So why wear a Watson jersey? From USA Today's Martin Rogers:

"Back in January, back when the fight still seemed improbable, McGregor took aim at his opponent's ugly domestic violence record. Mayweather spent time in prison for battering Josie Harris, mother to three of his children, in September 2010.

Having split with Harris, she says he entered her home in the middle of the night and was infuriated to find messages from NBA player C.J. Watson on her phone. Mayweather's son, Koraun, then 10, told the Las Vegas Metropolitan Police Department that he had seen his father on top of Harris—hitting and kicking her."

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McGregor and Floyd Mayweather Jr. are set to face off Aug. 26 in one of the more intriguing fights in recent memory. That's due to McGregor's background as an MMA fighter, not a boxer, and Mayweather's perfect 49-0 record on the line.

The buildup to the fight has been controversial, however, with many decrying the amount of racial insensitivity on display.

As Khaled A. Beydoun of The Undefeated wrote:

"Boxing's checkered history of capitalizing on racial and ethnic rivalries to sell bouts has taken a turn for the worse with this unprecedented megafight, with racist taunts and bigoted trash talk showcased, loudly and vividly, throughout the four-city press tour that concluded in London on July 14."

Among other comments, McGregor told Mayweather to "dance for me, boy" during the press tour. Mayweather has hardly been an angel, however, using misogynistic and homophobic language during the lead-up to the fight.

It's unclear if McGregor's behavior during the press tour is the reason Green is pulling for Mayweather or if he is simply a fan of the undefeated boxer. But if two of the loudest men in sports, Green and McGregor, are about to exchange a war of words online, things could heat up quickly.