Mays starred in the 2013 picture Life of a King, co-starring alongside Cuba Gooding Jr.. Mays was cited in an August 9, 2013 interview of Cuba Gooding Jr. in the Huffington Post as part of the "next generation" of African-American actors. Millennium Entertainment has acquired all U.S. rights to the film.
Mays starred as Gabe in the 2015 sports drama film Southpaw, directed by Antoine Fuqua and written by Kurt Sutter. The film stars Jake Gyllenhaal, Forest Whitaker, and Rachel McAdams.
Mays also starred in FX’s drama Snowfall, focusing on the beginnings of the crack cocaine epidemic in Los Angeles in the 80’s. Mays portrays Kevin Hamilton, Franklin’s (Damson Idris) best friend since childhood.