Video by Victor Salazar

BROOKLYN - Undefeated rising welterweight star Errol "The Truth" Spence Jr. (20-0, 17 KOs) went emphatically from prospect to contender with a fifth-round stoppage of former world champion Chris Algieri (21-3, 8 KOs) on Premier Boxing Champions (PBC) on NBC Saturday night from Barclays Center in Brooklyn.

"It meant a lot to get the stoppage," said Spence Jr. "I did something Manny Pacquiao and Amir Khan couldn't do. That shows where I'm at in the welterweight division."

Spence Jr. was superior in every regard as he took control of the fight from the beginning with world-class bodywork and blazing speed. Algieri was expected to be a major step-up for the 2012 U.S. Olympian, but was unable to bother his opponent despite landing 31 percent of his punches to Spence Jr.'s 30 percent per CompuBox stats.

"I can't take anything away from this young hungry lion," said Algieri. "He did a great job. I trained really hard for this fight. I hope that people appreciate me and how hard I worked and what I brought to the fight."

"The Truth" dominated by landing 41 percent of his power punches over the five rounds and only lost one round on the three judges' scorecards. Spence Jr. sent Algieri down for the first time in the fourth round with a combination finished off by a straight left hand.

Algieri survived the round, but Spence Jr. was determined to get a stoppage and he connected with another straight left that put Algieri on the canvas early in round five.

"It was pretty one-sided, I felt," said Spence Jr. "I started slowly. He said he was going to take me to deep waters so I wanted to pace myself."

"I just wasn't sticking to the style and the strategy like I should have," said Algieri. "We had a couple of different styles that we were going to show him and I never stayed in one style long enough to be effective."

Spence Jr. saw his opportunity and launched a vicious attack in an attempt to end the fight. A massive left hook connected clean with Algieri's jaw and put him on the canvas for the third and final time, as referee Benjy Esteves waved off the bout at :48 seconds into the fifth round.

"Everyone wanted to see what I could do against a proven fighter and I blew him out of the water," added Spence Jr.

In the opening bout of the telecast, Polish star Krzysztof Glowacki (26-0, 16 KOs) sent former world champion Steve "U.S.S." Cunningham (28-8-1, 13 KOs) to the canvas four times on his way to a unanimous decision to retain his cruiserweight world title in front of a raucous Polish-heavy crowd.