On the February 11 episode of Raw, Dallas appeared, attacking Barrett before Barrett's match against Kofi Kingston.
Dallas later challenged Barrett for the Intercontinental Championship in a losing effort.
In 2008, Rotunda signed a developmental contract with World Wrestling Entertainment (WWE) and was assigned to Florida Championship Wrestling (FCW), where he debuted on November 15, 2008, by defeating Kaleb O'Neal.
At the FCW television tapings on June 23, The Rotundo Brothers defeated The Dude Busters (Caylen Croft and Trent Barretta) to become the number one contenders to the FCW Florida Tag Team Championship.
On the May 18 episode of Raw, Dallas reignited his rivalry with Neville, attacking him before and after his match with King Barrett.
On the Survivor Series pre-show, Dallas competed in a five-on-five traditional Survivor Series elimination tag team match where Dallas, The Cosmic Wasteland (Stardust, Konnor and Viktor) and The Miz lost to Goldust, The Dudley Boyz (Bubba Ray Dudley and D-Von Dudley, Neville and Titus O'Neil.
This was the start of a winning streak, which reached a third victory with the defeat of Xavier Woods on the May 30 episode of Smack Down.
The next day, Dallas entered the Rumble match at number 16, where he lasted over 20 minutes and eliminated the WWE Intercontinental Champion, Wade Barrett, who returned to the ring and eliminated Dallas.
At Tribute to the Troops, Bo Dallas, dressed as Uncle Sam, lost to Mark Henry.
On the January 4, 2016 episode of Raw, Dallas, along with Heath Slater, Curtis Axel and Adam Rose, debuted as a new stable and went on to assist Slater in defeating Dolph Ziggler, calling themselves "social outcasts".
Dallas continued his streak with wins over Santino Marella, Xavier Woods, R-Truth, Fandango and Titus O'Neil.
Dallas established himself as a heel when he attacked El Torito after his eleventh victory over Diego on the July 4 episode of Smack Down.