In early 2019, vignettes began airing on Impact Wrestling to promote Ace Austin’s debut in the company. On the March 8th episode of Impact! he made his debut in Impact by defeating Jake Atlas. It was then revealed that Austin had signed with the company. Eventually, over the next couple of weeks, Austin would remain undefeated against Damian Hyde and Aiden Prince before making his pay-per-view debut at United We Stand, where he participated in an Ultimate X Match to determine the #1 contender for the X Division Championship. Johnny Impact won the match. Next, Austin continued his winning streak by defeating Aiden Prince, Eddie Edwards, Jake Crist, and Jake Deaner over a six-way match at Rebellion. Austin would then engage in a short feud with Williams which led to a match between him and Williams on the May 3rd episode of Impact!, which Austin won. Austin’s winning streak came to an end on June 21st when he lost to TJP but continued jockeying for position and against Goldust throughout time.
In 2019, Austin would feud with other X Division stars Eddie Edwards and Tessa Blanchard. Austin would defeat Edwards in a match on the October 11 episode of Impact!, qualifying for the ladder match for a shot at the X Division Championship, the prize during Bound for Glory, which he ended up winning after defeating Daga, Jake Crist, and Acey Romero. The feud continued with a street fight at Prelude to Glory where Austin lost to Edwards but got his revenge by beating him in a street fight on the October 29 episode of Impact!. The feud was concluded with a tables match between the two on No Surrender, which Edwards won.
Austin began feuding with the Impact World Champion in early 2020, stemming from the fact that Austin had beaten her in a ladder match to win the X Division Championship at Bound for Glory. The feud between the two led to a champion vs. champion match between the pair at Sacrifice, which Blanchard won. This win earned Blanchard a title shot against Austin for the X Division Championship on February 25. Austin retained the title by getting disqualified after Taya Valkyrie attacked Blanchard. Austin lost the title to Willie Mack at Rebellion Night 1.[20] He received a rematch for the title against Mack in a three-way match, also involving Chris Bey, on May 5 where Mack retained and Austin failed to become comeback champion.
