Earlier it known that Manny was asked to be an under card for Jeff Horns fight but Manny rejected the offer. There were also rumors that Manny can't fight in the US like in Las Vegas because he has issues with the IRS "again".
I don't know that these issues are existing with Manny Pacquiao. It wasn't reported to the news that he was offered to be an underdog or he chose to keep quiet and choose to be silent.