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.

LAS VEGAS – As one of just two men to have fought both Manny Pacquiao and Mario Barrios, Keith Thurman is well placed to pontificate on their Saturday clash at the MGM Grand.