
In January 1980, Sika and his brother Afa, as The Wild Samoans, debuted in the World Wrestling Federation with Lou Albano as their manager, quickly establishing themselves as a force in the tag team division through a series of decisive victories. In addition to competing in the tag division, the brothers wrestled as singles competitors, with Sika unsuccessfully challenging Bob Backlund for the WWF Championship in March 1980.
On April 12, 1980, The Wild Samoans defeated Ivan Putski and Tito Santana to win the WWF World Tag Team Championship. Their reign lasted until August 9, 1980, when they lost to Backlund and Pedro Morales at Showdown at Shea. As Backlund was the then-WWF Champion, he and Morales were forced to vacate the championship, and The Wild Samoans regained the championship on the September 9, 1980, episode of WWF Championship Wrestling, defeating Tony Garea and Rene Goulet in the finals of a tournament. Their second reign lasted until November 8, 1980, when they lost to Garea and Rick Martel. The Wild Samoans left the WWF in December 1980.
The Wild Samoans returned to the WWF in January 1983, once again adopting Lou Albano as their manager. They won the WWF World Tag Team Championship for a third and final time on March 8, 1983, defeating Chief Jay Strongbow and Jules Strongbow. During their reign, Sika sustained an injury, with his nephew Samu substituting for him in several title defenses. The Wild Samoans' reign ended on November 15, 1983, when they lost to Soul Patrol (Rocky Johnson and Tony Atlas) after Albano accidentally hit Afa with a chair.
After splitting from Albano, The Wild Samoans challenged Soul Patrol on several occasions but were unable to regain the championship. In April 1984, Sika unsuccessfully challenged Hulk Hogan for the WWF Championship in one of Hogan's earliest title defenses. In mid-1984, The Wild Samoans turned face and began a lengthy feud with The North-South Connection (Adrian Adonis and Dick Murdoch). They left the WWF once more in January 1985.
With Afa now semi-retired, Sika returned to the WWF in August 1986 as a singles wrestler. Managed by The Wizard, he spent several weeks undefeated before losing to Pedro Morales in November 1986.
In March 1987, Sika formed a tag team with Kamala, aligning himself with Kamala's manager, Mr. Fuji, and "handler", Kim Chee. The duo wrestled a series of matches against The Can-Am Connection and took part in several tournaments. The team was dissolved in August 1987 when Kamala left the WWF. In September 1987, Sika competed in the King of the Ring tournament, losing in the first round to S.D. Jones. On the October 3, 1987 Saturday Night's Main Event XII (recorded September 23, 1987), Sika unsuccessfully challenged WWF Champion Hulk Hogan in the main event. He went on to wrestle a series of matches against Bam Bam Bigelow and then against Jake Roberts. At the Slammy Awards ceremony on December 16, 1987, the "Song of the Year" category ended with no winner after Sika ate the envelope containing the winner's name.
In early 1988, Sika's regular opponents included Lanny Poffo, George Steele, and Hillbilly Jim. On March 27, 1988, he appeared on his first pay-per-view, competing in a battle royal at WrestleMania IV. Sika left the WWF once more following the bout.
On March 31, 2007, The Wild Samoans were inducted into the WWE Hall of Fame by Sika's son Rosey and Afa's son Samu.
The Wild Samoans appeared at Hell in a Cell 2020 to celebrate Roman Reigns' victory.
Sika passed away on June 25, 2024.