In 2018, he made his first trip to Mexico for The Crash in a trios match, losing to Octagón and Blue Demon Jr.[2] On January 17, 2019, Fatu signed with Major League Wrestling, joining his relatives Samu and Lance Anoaʻi in the company.

[5] Fatu and frequent tag team partner Josef Samael made their televised debut at Intimidation Games on March 2, attacking MLW World Heavyweight Champion Tom Lawlor following his cage match against Low Ki, forming the heel stable Contra Unit with Simon Gotch.

[9] Throughout his reign, Fatu successfully defended the title against Brian Pillman Jr., Davey Boy Smith Jr., ACH, Calvin Tankman and Matt Cross.

[10][11][12][13][14] Fatu was eventually challenged for the title by Alex Hammerstone, who put his MLW National Openweight Championship on the line in a winner takes all match.

[17] Fatu subsequently started a feud with fellow Contra Unit members Mads Krule Krügger and Ikuro Kwon and repackaged himself through a series of vignettes, turning face in the process.

[34] Fatu made his debut on the June 21 episode of SmackDown, attacking Randy Orton, Kevin Owens, and Undisputed WWE Universal Champion Cody Rhodes, thus establishing himself as a heel and becoming the newest member of The Bloodline, led by his real life cousin Solo Sikoa.

[35] At Money in the Bank on July 6, Fatu made his in-ring debut in a six-man tag team match alongside Sikoa and Tama Tonga, defeating Rhodes, Orton and Owens.

[36] On the August 2 episode of SmackDown, Fatu and Tonga defeated DIY (Johnny Gargano and Tommaso Ciampa) to win the WWE Tag Team Championship.

[39] At Crown Jewel on November 2, Fatu, Tonga and Sikoa defeated the original incarnation of The Bloodline (Reigns and The Usos) in a six-man tag team match.