I can confirm this is true...I was there but was not allowed to film per gym rules...Floyd was trying something new where he spars two fighters at once and after a Zab feint Daniel Judah caught him with a shot to the ribs and fliyd took a knee
Mayweather knocks out sparring partner = Hell yeah yalll! Mayweather gets knocked down and dropped = Fuk dat. Its a lie! Flowmos unite!
Its believable, Judah is world class and fighters take bigger risk in sparring. I don't know if its true but I wouldn't doubt it.