Daivari began his championship pursuits for the Cruiserweight Championship in July 2017. Akira Tozawa called Daivari out on the July 24 episode of Raw for a rematch after Titus O'Neil forfeited their singles match the week prior on Tozawa's behalf. While Neville showed up to confront Tozawa, Daivari then appeared to attack both Tozawa and Neville. He faced off against Neville the next night on 205 Live, winning via count-out. When Enzo Amore became the Cruiserweight Champion, Daivari appeared to support Amore on 205 Live and became a member of Amore's heel faction "The Zo Train", along with Tony Nese, Drew Gulak, and Noam Dar. On January 23, 2018, Enzo Amore was fired from WWE after allegations of sexual assault were made public, thus forcing Amore to vacate the Cruiserweight Championship and quietly disbanding "The Zo Train". Following this, Daivari participated in a tournament to crown a new Cruiserweight Champion but lost in the first round to the debuting Buddy Murphy on the February 6, 2018 episode of 205 Live.
InWWE Greatest Royal Rumble, Ariya teamed up with his brother Shawn Daivari and insulted four Saudi Arabian prospects before being driven out by Mansoor. After an extended break from action to recover from an unspecified injury, Daivari returned on the November 28 episode of 205 Live, joining Hideo Itami in an attack on a local competitor. After that, he began accompanying Itami to the ring for his matches and interfering on his behalf. On January 29 episode of 205 Live Daivari turned on Itami after the latter lost to Akira Tozawa, the same day that Itami requested his release from WWE. On the March 23 episode of 205 Live, Daivari defeated Cedric Alexander, following a distraction from Oney Lorcan. On the April 23 episode of 205 Live, Daivari defeated Lorcan to become the number one contender for the Cruiserweight Championship. However at Money in the Bank, he failed to capture the title from Tony Nese. Shortly after he would feud with Oney Lorcan which lead to an Anything Goes match where he was defeated to end their feud.
In October 2019 he would begin a feud with Isaiah "Swerve" Scott but never defeated him. Around this time he would start wearing white pants and a Gucci belt to the ring. In 2020 he took a long hiatus from the ring and returned in August 2020 upset that new cruiserweights weren't respecting him. He would then form an alliance with Tony Nese calling themselves the "205 Live OG's" and throughout the first few months of 2021, they would mostly be defeated by the likes of newcomers Curt Stallion and August Grey. On June 25, 2021, Daivari was released from his WWE contract.[14]
On September 28, 2021, it was announced that Daivari would be debuting for New Japan Pro Wrestling for their New Japan Showdown shows facing Alex Zayne on Night 1 and teaming with Lio Rush against El Phantasmo and Chris Bey on Night 2.[17][18] He would make his return on June 18, 2022, at NJPW Strong, scoring a victory over Delirious.[19]
On November 12, 2021, Daivari made his All Elite Wrestling debut on AEW Rampage losing to Dante Martin.[20] On the June 28, 2022 episode of AEW Dark, he would make his return for the brand, defeating Caleb Konley.[21] Daivari also serves as a coach for AEW.[22]
Daivari attended Wayzata High SchoolinPlymouth, Minnesota.[1] He is Iranian-American and sometimes incorporates spoken Persian in his performances.[1] His brother, Dara, is also a professional wrestler, mostly known for his time in WWE under the names Khosrow Daivari and Daivari (shortened from his previous in ring name).[3]