In terms of hypothetical fights that will (probably) never happen, Floyd Mayweather vs. Ronda Rousey may even eclipse Mayweather vs. Manny Pacquiao. In March, Rousey argued that she could hang with Mayweather in an MMA fight where she could stay close to the ground. UFC president Dana White added fuel to the fire in May when he said that in a street fight or MMA bout, “Ronda wins that fight and hurts him badly.”

Mayweather arrived in Washington D.C. Tuesday to promote his September rematch with Marcos Maidana. Our own Bob Velin asked Mayweather about a potential fight with Rousey, but his deadpan response was a little shocking.

“I don’t even know who he is.”

When it was explained to Mayweather that Rousey is a female UFC fighter, he lifted his hands and repeated: “I a’int know who that is.”

(Thanks to MMAJunkie for sharing this story.)