Bloom debuted on WWF television on the April 11, 1999 episode of Sunday Night Heat, saving Droz from a beating at the hands of Big Bossman. Bloom was named Prince Albert, and joined a short-lived trio called "the Pierced Pals". He acquired the persona of Droz's personal tattooist. Droz and Albert continued to team together until Droz was paralyzed in October 1999, at which point Albert became the protege of the Big Bossman. The duo separated following the debut of Bull Buchanan, who formed a tag team with the Big Bossman.
In March 2000, Bloom, now commonly known as Albert, was recruited by Trish Stratus to form a tag team with Test. The tag team, known as T & A, competed in the tag team division throughout 2000, feuding with rival tag teams such as the Dudley Boyz and the Acolytes Protection Agency. In December 2000, the team separated after Bloom attacked Test under the orders of Stephanie McMahon Helmsley.
In April 2001, Albert formed a stable known as X-Factor with Justin Credible and X-Pac. On June 28, 2001 in New York City, New York, Bloom defeated Kane to win the WWF Intercontinental Championship. He lost the WWF Intercontinental Championship to Alliance member Lance Storm on July 23, 2001 in Buffalo, New York after several interferences. In July 2001, Credible left X-Factor and joined The Alliance. Albert and X-Pac continued to team until November 2001, when X-Pac was injured.
In late 2001, Albert adopted the nickname "The Hip Hop Hippo" and began teaming with Scotty 2 Hotty. Upon the introduction of the Brand Extension, both Bloom and Hotty were assigned to the SmackDown! brand. The tag team disbanded on April 4, 2002 when Albert attacked Hotty after the duo failed to defeat Billy and Chuck for the WWF Tag Team Championship.
Subsequently, he was not featured in any high profile feuds until December 2002, when he joined forces with Paul Heyman and The Big Show, and was renamed A-Train after Heyman's suggestion. A-Train and Big Show lost to The Undertaker at WrestleMania XIX. A-Train feuded with The Undertaker, whom he wrestled at SummerSlam, and Chris Benoit, whom he wrestled at No Mercy. At Survivor Series, he wrestled alongside Lesnar in a ten man Survivor Series match. He competed in the 2004 Royal Rumble match, but was eliminated by the eventual winner, Chris Benoit. When Benoit decided to compete against Triple H for the World Championship on the Raw brand, General Manager Paul Heyman held a SmackDown! style Royal Rumble where the winner would meet Brock Lesnar for the WWE Championship at No Way Out. He was eliminated by Eddie Guerrero, who went on to win the match. The alliance with Lesnar ended in March 2004 when Bloom was drafted to the Raw brand. A-Train debuted on Raw on June 7. On June 21, he suffered a torn rotator cuff. Before returning from injury, he was released from his WWE contract on November 1, 2004.