ARL Renegades

On December 5, 2018, Dallas was announced as one of eight cities that would join the newly reformed XFL, as well as Seattle, Houston, Los Angeles, New York, Tampa Bay, and Washington, DC. On February 7, 2019, Bob Stoops, the longtime head coach of the Oklahoma Sooners football team, was hired as the Dallas team's head coach. Stoops was the XFL's first head coaching hire. On April 23, 2019, Stoops named Chris Woods as his defensive coordinator. On May 16, 2019, Stoops named Hal Mumme as his offensive coordinator. The team name and logo were revealed on August 21, 2019, as well as the teams uniforms on December 3, 2019.

On October 15, 2019, The Renegades announced their first player in team history, being assigned former NFL quarterback Landry Jones.

Dallas lost their first game, against the St. Louis BattleHawks, by a 15–9 final. Kicker Austin MacGinnis tallied all of the Renegade points via field goals, but Dallas' failure to reach the end zone came back to haunt them, as St. Louis scored nine unanswered fourth quarter points to erase a slim deficit. Linebacker Tegray Scales had 13 Dallas tackles, three for a loss. The Renegades picked up their first win on the road, a 25–18 triumph over the Los Angeles Wildcats. Running back Cameron Artis-Payne reached the end zone three times on two touchdowns and a one-point conversion. His final score, a 17-yard scoring run in the penultimate minute, was the final blow in a fourth quarter that saw the two teams combined for 34 points. Another road victory awaited the Renegades in Week 3, as they topped the Seattle Dragons 24–12. Two MacGinnis field goals sandwiched a 65-yard touchdown pass from Landry Jones to Donald Parham in a fourth quarter that saw Dallas break a 12–12 tie. Parham reached the end zone twice over the afternoon. The XFL announced that the remainder of the 2020 XFL season had been cancelled due to the COVID-19 pandemic. The team finished with a 2–3 record. On April 10, 2020, the XFL suspended operations, with all employees, players and staff terminated.^[]

On August 3, 2020, it was reported that a consortium led by Dwayne "The Rock" Johnson, Dany Garcia, and Gerry Cardinale (through Cardinale's fund RedBird Capital Partners) purchased the XFL for $15 million just hours before an auction could take place; the purchase received court approval on August 7, 2020. The XFL hired Bob Stoops as a Head Coach on April 13, 2022, with the expectation that he would be coaching Dallas. On July 24, 2022, the return of a Dallas XFL franchise was confirmed, this time being known as "Arlington" instead of "Dallas", as well as the hiring of Bob Stoops. On October 31, 2022, the XFL officially announced that the Renegades name would be returning, with a brand new logo. The team went 4–6 in the 2023 season, but made the playoffs as the second team in the South Division. After beating the Houston Roughnecks in the South Division playoff game, it won the 2023 XFL Championship Game over the 10–1 D.C. Defenders by a score of 35–26.

In September 2023, Axios reported that the XFL was in advanced talks with the USFL to merge the two leagues prior to the start of their 2024 seasons. On September 28, 2023, the XFL and USFL announced their intent to merge with details surrounding the merger to be announced at a later date. The merger would also require regulatory approval. In October 2023 the XFL filed a trademark application for the name "United Football League". On November 30, 2023, Garcia announced via her Instagram page that the leagues had received regulatory approval for the merger and were finalizing plans for a "combined season" to begin March 30, 2024. The merger was made official on December 31, 2023.