With his sing-song flow and string of early mixtapes, LA rapper RJmrLA built a local following before emerging as one of the West Coast’s rising stars. The mixtape O.M.M.I.O. (“On My Mama I’m On”) marked his debut in 2013, a year in which he also appeared on tracks headlined by YG and DJ Mustard, two of his closest associates. Over the next few years, an assortment of tapes was issued, including additional O.M.M.I.O. volumes through Mustard’s 10 Summers label.