[4] Judah made his professional debut as an 18-year-old on September 20, 1996, in Miami, Florida and defeated Michael Johnson by technical knockout in the second round.

[4] Judah defeated Wilfredo Negron in January 1999 with a fourth-round knockout to win the Interim IBF Light Welterweight title.

[6] Two months later, on August 5, 2000, at the Mohegan Sun in Connecticut, Judah defeated former IBF Light Welterweight Champion Terron Millett by fourth-round knockout.

The fight would set up a unification match between Judah and WBC and WBA Light Welterweight Champion Kostya Tszyu, who defeated Oktay Urkal on the undercard.

[9] The much anticipated matchup between Judah and Tsyzu took place on November 3, 2001, at the MGM Grand in Las Vegas, Nevada for the Undisputed Light Welterweight Championship.

Judah jumped up instinctively and tried to signal that he was fine to referee Jay Nady, but was still very much dazed by the punch - evidenced by him wobbling severely on extremely unstable legs before falling to the canvas a second time.

While being restrained by his father and trainer, Yoel Judah, he broke loose and walked up to Nady and stuck his gloved fist into his neck and had to be pulled off by cornermen.

A few minutes later, Jimmy Lennon Jr. announced the official decision and Judah screamed out and again had to be restrained by a growing number of security guards and cornermen.

[4] On April 10, 2004, at the Mandalay Bay Resort and Casino in Las Vegas, Judah fought Cory Spinks for the Undisputed Welterweight Championship.

[13] For the rest of 2004, Judah defeated the very tough veteran former champion Rafael Pineda by split decision and Wayne Martell by first-round technical knockout dropping him 5 times in the fight .

[17] The stage was set when Judah unsportingly punched Baldomir on the thigh during the prefight introductions instead of touching gloves to show sportsmanship.

[23] It appeared that Judah scored a knockdown in the second round when Mayweather's glove touched the canvas; however, referee Richard Steele ruled it a slip.

[25] At an April 13 hearing, the Nevada State Athletic Commission fined Roger Mayweather $200,000 and revoked his boxing license for one year.

[27] On June 9, 2007, Judah took on WBA Welterweight Champion Miguel Cotto in New York City before a soldout crowd at Madison Square Garden.

He managed to get to his feet, but Cotto went after Judah with a relentless attack, turning him sideways along the ropes as he continued to throw punches.

Judah hurt Vazquez several times over the course of the contest, but he injured his left hand midway through the fight and was unable to finish off Vasquez.

[31] On August 2, 2008, Judah lost to Joshua Clottey by technical decision in a fight for the vacant IBF Welterweight title at the Palms Casino Resort in Las Vegas.

Clottey began steadily closing the distance between himself and his opponent from the third round, landing an increasing number of punches that took their toll on Judah.

[44] In June 2010, Judah expressed his intention in moving down to the light welterweight division after the upcoming fight, hoping to revitalize his career.

[47][48][49] On November 6, 2010, Judah won a split decision over previously undefeated Lucas Matthysse in a fight for the vacant regional NABO Light Welterweight title at the Prudential Center in Newark, New Jersey.

The Brooklyn native began the busier fighter, using the jab and trying to land uppercuts for the first two rounds, while Matthysse worked on the body.

Judah continued to box throughout the ninth round but Matthysse began to show more power in the tenth, focusing on the head of his opponent and knocking down the American boxer after a hard right hand to the jaw.

"[54] On March 5, 2011, Judah defeated Mabuza via technical knockout in the seventh round, at the Prudential Center in Newark, New Jersey, claiming the IBF title again after almost ten years.

[55] Judah fought WBA (Super) champion Amir Khan in a unification bout on July 23, 2011 at Mandalay Bay Resort & Casino, Las Vegas.

Judah's next bout was scheduled for February 9 against undefeated WBC & WBA (Super) Champion Danny García at the Barclays Center in Brooklyn, but was subsequently rescheduled to April 27, 2013 due to a rib injury sustained by Garcia during training.

Judah connected with power shots from the opening bell, landed a left hook to the head of Munguia in round 2 which dropped it on his back.

[64][65] A year later on January 27, 2018, Judah returned to the ring at the Grey Eagle Resort and Casino in Calgary, Alberta, Canada and fought Mexican boxer Noel Mejia Rincon (21-14-1, 12 KOs) over 10 rounds.

[66][67] After seventeen months of inactivity, and in only his third bout in six years, on June 7, 2019, at Turning Stone Resort Casino in Verona, New York, Zab Judah, age 41, was stopped in the eleventh round of a scheduled 12 rounder for the vacant NABA Super Lightweight title by Cletus Seldin.

According to police reports, the Street Fam Crew, the gang which attempted to rob Judah, was made up of 20 members, all former drug dealers from Fabolous' Brooklyn neighborhood.

[76] Judah also volunteers teaching a nursing assistance class and helps at an adult day care facility treating patients with dementia.