Pacquiao's pay-per-view fights have generated nearly $1.3 billion in revenue, including a staggering $400 million for his highly publicized 2015 fight against Mayweather. That fight also represented Pacquiao's highest payday to date, with him bringing in an estimated $130 million from the bout.

Manny Pacquiao returns from retirement on Saturday night to face WBC welterweight champion Mario Barrios. Whether Pacquiao's decision to return to the ring proves to be ill-advised or a moment that grows his legend is still to be seen.

A full Saturday of boxing is on tap for July 19 in Las Vegas, when welterweight champion Mario Barrios and Manny Pacquiao square off in a main event.