Roscoe made his first appearance on his brother's album Tha Streetz Iz a Mutha, featuring on the vocals "I Call Shots" and "Girls All Pause" along with Nate Dogg.
[3] Daz Dillinger was impressed with Roscoe and helped to produce his debut mixtape, "When The Pain Inflict", released in 2001.
On October 17, 2013, Roscoe released his mixtape Tha Influence, featuring guest appearances from Xzibit and Kendrick Lamar.
The mixtape features production by Best Kept Secret, Bink!, Charlie Red 3000, Fingazz, Hi-Tek, Jahlil Beats, Jake One, Just Blaze, Mike WiLL Made It, Nottz, Statik Selektah and Tone Mason.
The album features Too Short, Kurupt, Kobe, Clyde Carson, Xzibit, KJ Konteh, Yummy Bingham, E-Note, and K Young.