McGregor never defended the title, as he took some time off in 2017 due to the birth of his first son and later venturing himself in a boxing match against Floyd Mayweather Jr. (in which he lost).
McGregor forsvarede aldrig titlen, da han tog en pause i 2017 på grund af fødslen af hans første søn og senere vove sig ud i en boksekamp mod Floyd Mayweather Jr (hvor han tabte).