Manny Pacquiao vs. Mario Barrios live stream online: Watch tonight's Pacquiao comeback here

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Watch the Manny Pacquiao vs. Mario Barrios live stream online here on Uncrowned for Saturday's blockbuster Pacquiao vs. Barrios fight card from the MGM Grand Garden Arena in Las Vegas. Pacquiao, a living legend and boxing Hall of Famer, comes out of retirement at age 46 in pursuit of Barrios' WBC welterweight title in the night's main event. If he wins, "PacMan" will become the second-oldest world champion in boxing history.

Pacquiao (62-8-2, 39 KOs) is a significant betting underdog on BetMGM against Barrios (29-2-1, 18 KOs).

Pacquiao vs. Barrios' four-fight main card card kicks off at 8 p.m. ET on Amazon Prime PPV. Prior to that, a seven-fight undercard streams live and free at 5:30 p.m. ET below. Highlighted within that preliminary card is a lightweight bout between Gary Russell Jr. (33-2, 18 KOs) vs. Hugo Castaneda (15-2-1, 11 KOs), super bantamweights David Picasso (31-0-1, 17 KOs) vs. Kyonosuke Kameda (15-4-2, 9 KOs), super featherweights Mark Magsayo (27-2, 18 KOs) vs. Jorge Mata Cuellar (21-2-2, 13 KOs), middleweights Eumir Felix Marcial (5-0, 3 KOs) vs. Bernard Joseph (11-2-1, 5 KOs) and more.

Main Card (Prime Video PPV, 8 p.m. ET)

• WBC welterweight championship: Mario Barrios (c) vs. Manny Pacquiao

• WBC super welterweight championship: Sebastian Fundora (c) vs. Tim Tszyu

• Super lightweight: Isaac Cruz vs. Omar Salcido Gamez

• Featherweight: Brandon Figueroa vs. Joet Gonzalez

Live streamed undercard (Uncrowned, 5:30 p.m. ET)

• Lightweight: Gary Russell Jr. vs. Hugo Castaneda

• Super bantamweight: Alan Romero vs. Kyonosuke Kameda

• Super featherweight: Mark Magsayo vs. Jorge Mata Cuellar

• Welterweight: Abel Ramos vs. Jose Luis Sanchez

• Middleweight: Eumir Felix Marcial vs. Bernard Joseph

• Super lightweight: Jursly Vargas vs. Sergio Aldana

• Super welterweight: Joseph Brown vs. Aaron Watson

Saturday's live-streamed undercard can be watched below.

For full coverage of Pacquiao vs. Barrios including live results, play-by-play and highlights of the entire Manny Pacquiao vs. Mario Barrios pay-per-view card, check out Uncrowned's Pacquiao vs. Barrios hub.