Because while Mayweather was so protective of the zero on his loss ledger that he allowed his 2015 fight with Pacquiao to drag out at least five years beyond its expiration date, and because Pacquiao allowed his then-promoter Bob Arum to dictate his opposition, the business of boxing trumped the intriguing matchups that can magnetize a fan base beyond the hard-core followers.
Source: Los Angeles Times March 17, 2019 23:15 UTC