In December 1990, Smith appeared with the World Wrestling Federation as an enhancement talent, wrestling on WWF Superstars of Wrestling and WWF Wrestling Challenge. On July 10, 1993, Smith had a dark match against The Sandman for World Championship Wrestling.
Smith joined Extreme Championship Wrestling (ECW) as a fan favorite, where he competed at the company's first event Market Street Mayhem on February 25, 1992, by teaming with DC Drake to wrestle Johnny Hotbody and Larry Winters to a double disqualification. The two teams met in a rematch on March 24, which Smith and Drake won. On April 25, Smith participated in a battle royal to qualify for a match to determine the inaugural ECW Heavyweight Champion. On June 23, Smith teamed with Jimmy Jannetty to participate in a tournament for the new ECW Tag Team Championship, where they lost to The Super Destroyers in the semi-final round.
The following year, Smith entered a tournament for the vacant ECW Television Championship, losing to Eddie Gilbert in the quarter-final round on the April 13, 1993 episode of ECW. Smith unsuccessfully challenged Jimmy Snuka for the Television Championship at Super Summer Sizzler. On the August 3 episode of ECW, Smith lost to The Dark Patriot, which was notable for the twenty foot fall Smith took from an upstairs announcing area onto the floor, followed by the Dark Patriot leaping from the upstairs area onto the back of Smith. This incident led to a scaffold match between Smith and Patriot at UltraClash, which Smith lost. Smith received a title shot against Shane Douglas for the Heavyweight Championship. During the match, Terry Funk threw in the towel for Smith but Smith threw it back on Funk's face. Smith lost the match and Funk attacked him after the match. At Holiday Hell, Smith and Tommy Cairo unsuccessfully challenged Kevin Sullivan and The Tazmaniac for the Tag Team Championship.
Smith had a notable match at The Night the Line was Crossed on February 5, 1994, in which he defeated Mike Awesome. On the March 22 episode of Hardcore TV, Smith defeated The Tazmaniac to win the Television Championship. During the match, Smith rescued Woman from The Public Enemy (Johnny Grunge and Rocco Rock), which resulted in a rivalry between Smith and Public Enemy. Smith successfully defended the title against Rockin' Rebel at the inaugural Ultimate Jeopardy event on March 26. He lost the title to The Pitbull on the April 19 episode of Hardcore TV after Public Enemy attacked Smith before the match. At When Worlds Collide, Smith teamed with The Bruise Brothers (Don and Ron) to defeat Public Enemy, Mr. Hughes and Shane Douglas in a handicap elimination match when he became the survivor of his team by single-handedly eliminating Public Enemy.
Smith's momentum would be slowed down in the following months. Smith attempted to regain the Television Championship from Jason on the September 13 episode of Hardcore TV, but lost the match after suffering a knee injury. He wrestled The Public Enemy on several occasions in 1994 as he tried to win the World Tag Team Championship from Public Enemy with different tag team partners including The Sandman, Tommy Dreamer and Hack Meyers, but failed to win the title. Smith defeated Hack Meyers at November to Remember. He would then face Stevie Richards in a losing effort at Holiday Hell. Smith took a hiatus from ECW in 1995.
Smith returned to ECW after recovering from an injury at Wrestlepalooza on August 5, 1995, where he faced Hack Meyers in a match. Smith achieved his greatest success and biggest highlight of his ECW career in that match as a result of a legitimate mistake, as he attempted a suicide dive to the outside on Meyers, but failed to get enough elevation; his knee pads caught on the ropes and he landed head-first on the arena floor. This resulted in a large, softball-sized swelling on his head, but Smith was able to defeat Meyers with the help of Italian wrestler Val Puccio. This was turned this into a comedic storyline where Smith's injury and resulting concussion gave him mild brain damage, and he began believing he was Italian, even talking with an Italian accent. Smith befriended Puccio, thus turning into a villain for the first time in his ECW career. The ECW fans jeered Smith when he attempted a move and failed, but this time with a degree of affection. At Gangstas Paradise, Smith faced Hack Meyers in a rematch, in which he got counted-out after missing a moonsault and crashing through a table outside the ring. At Holiday Hell, Smith botched a split-legged moonsault against Meyers, which led to Meyers winning the match.
This successful character continued, and resulted in the formation of a faction known as The Full Blooded Italians with Val Puccio. Puccio left ECW in 1995 while Smith continued the character on his own. At Massacre on Queens Boulevard on April 13, Smith introduced Damien Stone as his "cousin" and the newest member of the F.B.I., nicknaming him "Little Guido", which would become the ring name of Stone. While the F.B.I. claimed to be purebred Italians, the fact that Smith was African American, which made this claim obviously dubious. FBI feuded with The Dudleys and Hack Meyers throughout 1996. At November to Remember, Smith lost to 2 Cold Scorpio in a loser leaves town match, thus being banned from competition for thirty days. At Holiday Hell, Little Guido kicked Smith out of FBI due to Smith losing to Scorpio.
Smith turned back into a fan favourite due to being kicked out of his own created F.B.I. by Little Guido and entered a rivalry with the Full Blooded Italians. He left ECW as a full-time competitor, returning to team with Chris Chetti to defeat Guido and Tracy Smothers in a non-televised tag team match at the Barely Legal pre-show. He then made his televised return for one night only at UltraClash on September 19, 1998, where he teamed with Tommy Rogers and Chris Chetti to defeat Little Guido, Tracy Smothers and Tommy Rich in an Italian Vendetta match. This would be Smith's last appearance in ECW and his last wrestling match as he retired from wrestling after the event.
At the WWE-produced ECW One Night Stand pay-per-view in 2005, Smith and several other F.B.I. members accompanied Little Guido to ringside as he faced Super Crazy and Yoshihiro Tajiri in a three-way dance, but were unable to prevent him from being pinned and eliminated by Tajiri.