He is signed to WWE, where he performs on the Raw brand under the ring name Austin Theory, and is in a tag team with Grayson Waller as A-Town Down Under.

White has been a fan of professional wrestling since childhood, citing John Cena as a huge influence and having dreams of joining WWE since he was eight years old.

[8][4] He made his professional wrestling debut on May 5, 2016, under the ring name Austin Theory, defeating A. R. Fox to win the WWA4 Heavyweight Championship.

[17] Over the next few months, Theory successfully defended the title against the likes of Henry, Kyle O'Reilly, Raul Mendoza, and Leon Ruff.

[9] On March 2, 2019, Theory defeated Willie Mack, Bárbaro Cavernario and Sansón to win The Crash Heavyweight Championship.

[26] On June 14, Theory made his Consejo Mundial de Lucha Libre debut representing The Crash, teaming with Carístico and Volador Jr. to defeat Rush and La Peste Negra (Bárbaro Cavernario and Negro Casas).

[35] On the May 18 episode of Raw, Theory was attacked by Andrade and Garza after accidentally costing them a tag team match against Apollo Crews and Kevin Owens, kicking him out of the faction.

[41] In January 2021, Theory and Gargano lost to Kushida and Leon Ruff in the first round of the 2021 Dusty Rhodes Tag Team Classic.

[55] Two days later on Raw, Theory defeated Kevin Owens to qualify for an Elimination Chamber match for the WWE Championship at the namesake event on February 19,[56] but was the last man pinned by Brock Lesnar after being hit with an F-5 from the top of one of the pods down to the floor.

[66][67][68] At Money in the Bank on July 2, Theory lost the United States Championship to Bobby Lashley, ending his reign at 75 days.

[73] At Clash at the Castle on September 3, he again attempted to cash in his Money in the Bank contract during the main event, only to be knocked out by Tyson Fury before he could officially do so.

[74] On the November 7 episode of Raw, Theory cashed in his Money in the Bank contract on Rollins for the United States Championship, but was unsuccessful, partially due to interference from Lashley.

[75] On November 26, at Survivor Series WarGames, Theory defeated Rollins and Lashley in a triple threat match to win his second United States Championship.

Theory was subsequently defeated by Escobar's Latino World Order stablemate Rey Mysterio in an impromptu title match, ending his second reign at 258 days.

[92] The following week, he defeated LA Knight to become the #1 contender to the United States Championship, but failed to regain the title from Mysterio on September 2 at Payback.

[93][94] Later that month, after a segment with Pat McAfee and The Rock, Theory began working with Grayson Waller as a tag team, known as A-Town Down Under.

[95][96] On the October 13 episode of SmackDown, Theory and Waller challenged Cody Rhodes and Jey Uso for the Undisputed WWE Tag Team Championship in a losing effort.

[97] On the January 12, 2024 episode of SmackDown, Theory faced NXT's Carmelo Hayes, but their match ended in a shoot no-contest after both of them landed on their heads from the top rope.

[98] WWE later announced that they only suffered face contusions and Theory proceeded to defeat Hayes in their rematch on the January 26 episode of SmackDown.

[99][100] The next night, at the Royal Rumble, Theory helped Logan Paul retain the United States Championship against Kevin Owens after handing him brass knuckles.