The Harris Brothers were signed by the World Wrestling Federation in 1995, where they were renamed "The Blu Brothers". They retained their trademark bushy beards and long hair and were managed by Uncle Zebekiah. They made their WWF debuts at the 1995 Royal Rumble and were defeated by Lex Luger and The British Bulldog in the opening match of WrestleMania XI. They eventually left the WWF and returned to ECW in 1996 as the Bruise Brothers, competing once more in the tag division, and briefly joining Raven's Nest.
Don and Ron Harris returned to the WWF in 1996, as the short-lived "Grimm Twins", and in June 1997, when they returned to the WWF as "8-Ball" (Ron) and "Skull" (Don), joining the Disciples of Apocalypse stable with Crush and their cousin, Chainz. The DOA participated in the "gang wars" of 1997, feuding with the African American Nation of Domination and the Hispanic stable Los Boricuas. They went on to compete in the tag division throughout 1998. Ron Harris also competed in the WWE's Brawl For All tournament on July 20, 1998, but lost to 2 Cold Scorpio in the third round.
They continued wrestling in the company until the Summer of 1999, in which they then left.