section_path: Career/2003–2008: Beginnings
section_name: 2003–2008: Beginnings
paragraph_text: 2003–2008: Beginnings
  
  During high school, Lamar adopted the stage name K.Dot and began freestyling and battle rapping at school. His performances caught the attention of fellow student Dave Free, who traveled from Inglewood to watch him rap. They quickly formed a friendship over their love of hip-hop and the television sitcom Martin. They recorded music together at Free's makeshift garage studio and at his older brother's Hyde Park apartment. Lamar's earliest performances were held at a "super hood" comedy club and behind a tattoo parlor. Free was his hype man during that time, while his older brother was his manager and disc jockey. Lamar recorded five mixtapes throughout the 2000s; his first, Youngest Head Nigga in Charge (Hub City Threat: Minor of the Year), was released on April 15, 2003, through Konkrete Jungle Musik. The mixtapes primarily consisted of freestyles over the production of popular hip-hop songs.
  
  In a series of retrospective reviews for Rolling Stone, Mosi Reeves complimented Lamar's "unerring" sense of rhythm and timing found in Hub City Threat: Minor of the Year, but criticized his "clumsy" lyricism and that his flow was "overly beholden to... Jay-Z and Lil Wayne". Free, who was working as a computer technician, introduced the mixtape to record producer Anthony "Top Dawg" Tiffith while attempting to repair his computer. Tiffith was impressed with Lamar's burgeoning abilities and invited him to partake in an audition process for entry into his newly established independent record label, Top Dawg Entertainment (TDE). During his audition, Lamar freestyled for Tiffith and record executive Terrence "Punch" Henderson for two hours, a strategy that impressed Henderson but bewildered Tiffith. He was offered a recording contract by TDE in 2005, joining Jay Rock as the label's first signings. Upon signing, he purchased a minority stake in the label for an undisclosed amount.
  
  Lamar had a brief stint as a security guard when he started working on music with Jay Rock at TDE's in-house recording studio. The bond he formed with him, Ab-Soul and Schoolboy Q led to the formation of the hip-hop supergroup, Black Hippy. Lamar released his second mixtape, Training Day, on December 30, 2005. Reeves complemented its varied production and "well-executed" concept, which was based on the 2001 film. In 2006, Lamar signed an artist development deal with Def Jam Recordings and was featured on two singles by the Game. He also heavily contributed to Jay Rock's first two mixtapes, Watts Finest Vol. 1 and Watts Finest Vol. 2: The Nickerson Files. Lamar was ultimately let go from Def Jam after an encounter with its president and chief executive officer, Jay-Z; he later described it as "one of those situations where I wasn't ready." Lamar and Jay Rock released a collaborative mixtape, title No Sleep 'til NYC, on December 24, 2007. Reeves thought the project was a "fun cypher session, nothing more, nothing less."
  
  During high school, Lamar adopted the stage name K.Dot and began freestyling and battle rapping at school. His performances caught the attention of fellow student Dave Free, who traveled from Inglewood to watch him rap. They quickly formed a friendship over their love of hip-hop and the television sitcom Martin. They recorded music together at Free's makeshift garage studio and at his older brother's Hyde Park apartment. Lamar's earliest performances were held at a "super hood" comedy club and behind a tattoo parlor. Free was his hype man during that time, while his older brother was his manager and disc jockey. Lamar recorded five mixtapes throughout the 2000s; his first, Youngest Head Nigga in Charge (Hub City Threat: Minor of the Year), was released on April 15, 2003, through Konkrete Jungle Musik. The mixtapes primarily consisted of freestyles over the production of popular hip-hop songs.
  
  In a series of retrospective reviews for Rolling Stone, Mosi Reeves complimented Lamar's "unerring" sense of rhythm and timing found in Hub City Threat: Minor of the Year, but criticized his "clumsy" lyricism and that his flow was "overly beholden to... Jay-Z and Lil Wayne". Free, who was working as a computer technician, introduced the mixtape to record producer Anthony "Top Dawg" Tiffith while attempting to repair his computer. Tiffith was impressed with Lamar's burgeoning abilities and invited him to partake in an audition process for entry into his newly established independent record label, Top Dawg Entertainment (TDE). During his audition, Lamar freestyled for Tiffith and record executive Terrence "Punch" Henderson for two hours, a strategy that impressed Henderson but bewildered Tiffith. He was offered a recording contract by TDE in 2005, joining Jay Rock as the label's first signings. Upon signing, he purchased a minority stake in the label for an undisclosed amount.
  
  Lamar had a brief stint as a security guard when he started working on music with Jay Rock at TDE's in-house recording studio. The bond he formed with him, Ab-Soul and Schoolboy Q led to the formation of the hip-hop supergroup, Black Hippy. Lamar released his second mixtape, Training Day, on December 30, 2005. Reeves complemented its varied production and "well-executed" concept, which was based on the 2001 film. In 2006, Lamar signed an artist development deal with Def Jam Recordings and was featured on two singles by the Game. He also heavily contributed to Jay Rock's first two mixtapes, Watts Finest Vol. 1 and Watts Finest Vol. 2: The Nickerson Files. Lamar was ultimately let go from Def Jam after an encounter with its president and chief executive officer, Jay-Z; he later described it as "one of those situations where I wasn't ready." Lamar and Jay Rock released a collaborative mixtape, title No Sleep 'til NYC, on December 24, 2007. Reeves thought the project was a "fun cypher session, nothing more, nothing less."