Markeyvius LaShun Cathey, born August 3, 1997, records as Key Glock. He grew up in South Memphis raised by his grandmother and aunt after his mother was sent to prison when he was 20 months old, and cites Three 6 Mafia and Project Pat as his largest influences. His cousin Young Dolph signed him to Paper Route Empire in 2017, and the two released the joint albums Dum and Dummer and Dum and Dummer 2. His debut album Yellow Tape reached number 14 on the Billboard 200 and went gold, and Yellow Tape 2 hit number seven with the multi-platinum "Ambition for Cash." "Proud," released after Dolph was murdered in November 2021, was his first Hot 100 entry, and "Let's Go" from Glockoma 2 became a sleeper hit. He now leads Paper Route Empire as its most prominent artist.