In May 1987, he signed with the World Wrestling Federation (WWF). The storyline upon his debut was that the various heel managers were all vying for Bigelow's services. The angle was thus called "The Battle for Bam Bam." Bigelow in the end wound up a babyface when he denounced all the heel managers and announced that his manager was going to be Oliver Humperdink. Fans were entertained by Bigelow's unique style and his remarkable agility for a man his size. His first WWF encounters were Nikolai Volkoff and his jilted manager Slick. Bigelow wrestled as a part of Hulk Hogan's team at the first Survivor Series, in which he survived longer than even Hogan (the biggest draw in the industry's history at the time). He eliminated both King Kong Bundy and One Man Gang, but eventually lost to sole survivor André the Giant. He wrestled in the WWF for one year before leaving to have surgery on a badly injured knee. Despite this injury, he performed anyway to elevate the status of his co-performers. Bigelow lost by count-out to One Man Gang in the first round of WrestleMania IV.
In late 1992, Bigelow returned to the WWF as a heel. In his pay-per-view return, he defeated The Big Boss Man at the 1993 Royal Rumble. That June, Bigelow made it to the finals of the 1993 King of the Ring tournament, losing a match to Bret Hart. Soon after, Luna Vachon became Bam Bam's love interest and manager. Bigelow went on to feud with Tatanka and Doink the Clown; he teamed with The Headshrinkers to lose to Tatanka and The Smokin' Gunns at SummerSlam 1993, his team consisting of The Headshrinkers and Bastion Booger was defeated by The Four Doinks (The Bushwhackers and Men on a Mission) at the 1993 Survivor Series, he lost to Tatanka at the 1994 Royal Rumble and he teamed with Luna to defeat Doink and Dink at WrestleMania X. In mid-1994, he was made part of Ted DiBiase's Million Dollar Corporation faction, often teamed-up with fellow Corporation members Irwin R. Schyster and (a now heel) Tatanka. Bigelow also survived a high profile Survivor Series-style match, with Corporation member King Kong Bundy, at the 1994 Survivor Series; they faced Lex Luger's "Guts and Glory" team.
After Bigelow and Tatanka lost in the finals of a WWF World Tag Team Championship tournament to Bob Holly and the 1-2-3 Kid at the 1995 Royal Rumble, Bigelow was mocked at ringside by former New York Giants linebacker Lawrence Taylor. Bam Bam fought back, shoving "L.T." at ringside, and was soon engaged in a highly-publicized feud with the famous ex-football player. Bigelow was defeated by Taylor in the main event at WrestleMania XI. Shortly thereafter, Bigelow was turned babyface, publicly quitting the Million Dollar Corporation. He was teamed with then WWF World Champion Diesel at the 1995 King of the Ring; they defeated Corporation members Tatanka and Sycho Sid. Bigelow's last WWF match was a loss to Goldust at Survivor Series 1995.
On the morning of January 19, 2007, Bigelow was found dead in his home.