ATK Ybeezy, real name Caleb Sheffield, is an up and coming rapper from Jacksoville, Florida and a member of ATK along with Yungeen Ace, Ksoo, Fastmoney Goon and more.

On June 1, 2019, he was arrested and charged with 4 counts of attempted murder. He was released a few weeks later after proving he was at a basketball game in Orlando at the time of the shooting.

On July 4, 2021, he was arrested in Pittsboro, North Carolina for possession of weapons of mass destruction, possession of a stolen firearm and resist, obstruct and delay. He was convicted on August 11, 2022 after a four day jury trial. On December 6, 2022, he was sentenced to 4 years in prison. His release date is December 10, 2024.