Johnny Reed McKinzie, Jr. (born March 31, 1986), better known by his stage name Jay Rock, is an American hip hop recording artist from Los Angeles, California. Jay Rock grew up in Watts, Los Angeles, known for its low income, as well as its gang and drug infested streets. Rock ultimately chose to take rapping over street life, after Anthony Tiffith, CEO of indie record label Top Dawg Entertainment (TDE), found Rock in 2005 and signed him to his label. In 2007, alongside TDE, Rock secured a recording contract with Warner Bros. Records and later Asylum Records, but after both mergers fell through, the label linked up with Strange Music, after Tech N9ne, Missouri-based rapper and founder of the label, met with them and offered Rock a record deal.

Since 2006, Rock has released several mixtapes and is perhaps best known for his 2008 commercial debut single, "All My Life (In the Ghetto)", which features fellow American rappers Lil Wayne and will.i.am. Apart from his solo career, Rock is also known for being a member of hip hop supergroup Black Hippy, alongside fellow West Coast rappers and TDE label-mates Kendrick Lamar, Schoolboy Q and Ab-Soul. In 2011, after signing his joint-venture deal with Strange Music, Rock's often-delayed and long-awaited debut studio album, Follow Me Home, was released in July of that year. The album was supported by the singles "All My Life (In the Ghetto)" and "Hood Gone Love It".

His second studio album 90059 is due for release in 2015, and is supported by the singles "Money Trees Deuce", "Gumbo" and the album's title track.