well a couple of things bro:

1) oscar cockblocked pac man by making HBO part of the injunciton to not promote or show the pac man fight until the legal case is clear. so HBO could not have helped promote or even pretend the fight was even taking place for the matter so that obviously hurt the numbers

2) Texas is real close to mexico so the majority of the demographic was of latino descent so pac man didnt have his core fan base demographic targeted in good ole texas.

now if the fight was in LA, SF, Hawaii, and of course VEGAS then u know this mother would break records!