Kelenna Azubuike was born December 16, 1983 in London, England and raised in Tulsa, Oklahoma. After finishing his junior season in college, Azubuike declared himself eligible for the 2005 NBA Draft, eventually going undrafted that year. Azubuike then played for the Fort Worth Flyers of the Development League, leading the league in scoring during the 2006-07 season and eventually being called-up to play for the Golden State Warriors.
Playing under coach Tubby Smith, Azubuike said that the biggest improvement to his game at Kentucky was the ability to create offense through intense defense. As a junior, Azubuike was named to the All-SEC Second Team by the Associated Press and the league’s coaches after leading the team and ranking tenth in the SEC in points per game, averaging 14.7 overall. Azubuike was named to the 2005 SEC All-Tournament Team after averaging 18.0 points in three contests. During his time with the Cats, Azubuike helped the Wildcats to earn two Southeastern Conference titles, two SEC Tournament titles, and two NCAA Elite Eight appearances. Azubuike averaged 10.0 points and 3.7 rebounds in 97 career games at the University of Kentucky, shooting a 48.5% field goal average for his college career. While attending the University of Kentucky, Azubuike majored in business marketing.
On January 2, 2007, the Golden State Warriors signed Azubuike. Azubuike was the first call-up of the 2006-07 NBA Development League season, and the 49th player overall to be called-up to the NBA since the D-League began play in November 2001. During his second season with Golden State, Azubuike expressed an interest in playing for the British team during the build-up to the 2012 London Olympic Games, but was denied British citizenship under the 1981 British Nationality Act. On July 17, 2008, Azubuike signed an offer sheet with the Los Angeles Clippers for a three-year deal worth $9 million, with Golden State having seven days to match the offer. In the final hour, Golden State matched the offer made by the Clippers on July 24, 2008, allowing Azubuike to remain a Warrior.
On November 17, 2009, it was announced that Azubuike would miss the remainder of the 2009-10 season because of a torn patella tendon.
On July 9, 2010, Azubuike was traded to the New York Knicks along with Anthony Randolph, Ronny Turiaf and a future second-round pick in a sign and trade deal for David Lee. Azubuike was waived by the Knicks on February 28, 2011 after failing to suit up the entire season.