He is a member of the hip hop group ASAP Mob, from which he adopted his moniker.

In 2014, he released the song "Xscape", the second single to the ASAP Mob's debut album L.O.R.D.

He was introduced to fellow member ASAP Rocky by Yams at a house party in 2008.

[6][7][8] Twelvyy also appeared on the ASAP Mob's debut mixtape Lords Never Worry released on August 28, 2012.

On April 21, 2014, Twelvyy released the song "Xscape", which was the second single to the ASAP Mob's debut album, L.O.R.D.

[14] On August 24, 2015, Twelvyy released his next single, "Heaven Can Wait" featuring Emilz.

[16] On January 29, 2016, he releases a song called "Trips" in anticipation for his tour with Flatbush Zombies.

[19] On March 9, 2016, Twelvyy released another song for the series called "Again" which features ASAP Ant.

[21] On March 30, 2016, Twelvyy released another song with Rocky and Nast called "Presidents", which is also included in the #WavyWednesdays series.

[22] On August 31, 2016, ASAP Twelvyy released Motivation featuring Da$h and AZ.