One of the greatest fighters of the past 30 years is set to return to the ring on July 19 when Manny Pacquiao ends his retirement to face Mario Barrios. Pacquiao will be looking to add to his legendary resume by picking up another championship as Barrios' WBC welterweight title will be on the line.

Pacquiao has come out of retirement in search of Barrios' welterweight title — here's what you need to know.

Here's when the fighters are expected to enter the ring as Manny Pacquiao challenges WBC welterweight champion Mario Barrios in Las Vegas.