He is best known for his guest appearance alongside Wale on Waka Flocka Flame's 2010 single "No Hands," which peaked at number 13 on the Billboard Hot 100 and received diamond certification by the Recording Industry Association of America (RIAA).

Roscoe Dash guest appeared alongside Kanye West on Big Sean's 2011 single "Marvin & Chardonnay," which peaked at 32 on the Billboard Hot 100.

[5] In his basement, he continued recording mixtapes; this activity led him to connect with his cousin Torrey Hood, who was managing a local hip hop trio by the name of Travis Porter.

On August 1, 2009, Porter's second mixtape, I'm a Differenter 2, was released, and an early version of Johnson's song, "All the Way Turnt Up", was part of the tracklist.

[10][11] Shortly after its original release, Dash re-recorded "All the Way Turnt Up", and included a guest verse from fellow Atlanta-native Soulja Boy.

Dash then began recording for his debut studio album, titled Ready Set Go!, although it was leaked and shipped before the official release date.

The following year, Dash guest featured on the single "No Hands" by fellow Atlanta native Waka Flocka Flame, alongside Washington D.C. rapper Wale.

[14] In 2012, Johnson was featured on the cover of XXL magazine, as part of their annual "Top 10 Freshmen list", along with fellow rappers Iggy Azalea, Danny Brown, Kid Ink, Future, Hopsin, Macklemore, French Montana, Don Trip and Machine Gun Kelly.