would Mayweathers record count if he was to fight mc Gregor??

[Jcsuper]

Julie Cesar Chavez, when he was 40-0-0 with 35 kos, fought a guy with a record of 0-0-0. As far as i know it counted, some people here are even claiming that Floyd didnt beat Chavez record, so I dont see why floyd could not fight a 0-0-0 guy and get his win counted.