Those are fighting words: McGregor calls out Mayweather on Instagram

Will the super fight ever happen?

Irish MMA champ, Connor McGregor, aimed some good old-fashioned trash talk at his desired foe Floyd Mayweather on his official Instagram account Sunday.

McGregor may have also broken a bit of news with this post, indicating he has already put pen to paper as he challenges Floyd to reciprocate and "sign your end."

The "super fight,"as it has been dubbed by boxing and MMA fans, has yet to become official, but even Mayweather admits it is "90% likely" to happen. The only potential hold up is how the two fighters will split the pay-per-view dollars.

We will have to wait and see how Floyd responds to McGregor's challenge.

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