Answer by taking a quote from the following article:

Kevin Maurice Garnett (born May 19, 1976) is an American former professional basketball player who played for 21 seasons in the National Basketball Association (NBA). He played the power forward and center positions. In high school, Garnett was a 1995 McDonald's All-American at Farragut Career Academy and won a national player of the year award. He entered the 1995 NBA draft, where he was selected with the fifth overall pick by the Minnesota Timberwolves and became the first NBA player drafted directly out of high school in 20 years.

Garnett was born on May 19, 1976, in Greenville, South Carolina, to Shirley Garnett. He was the second of his mother's three children. Garnett's mother never married his father, O'Lewis McCullough, with their relationship ending shortly after his birth. Garnett grew up with his mother and stepfather, Ernest Irby, with whom he didn't get along, and two sisters.  Garnett fell in love with the sport of basketball while attending Hillcrest Middle School, although he did not play organized basketball until high school. In his first three years of high school, Garnett attended Mauldin High School in Mauldin, South Carolina and played on the school's basketball team. However, during the summer before his senior year of high school, Garnett was in the general vicinity of a fight between black and white students. Although not directly involved, Garnett was one of three students arrested for second-degree lynching, a charge that was expunged through a pre-trial intervention. Due to the racially charged incident and fearful of being a target, Garnett decided to leave Mauldin High and transferred to Farragut Career Academy in Chicago, for his senior year of high school.  He led Farragut to a 28-2 record and was named National High School Player of the Year by USA Today. He was also named Mr. Basketball for the state of Illinois after averaging 25.2 points, 17.9 rebounds, 6.7 assists and 6.5 blocks while shooting 66.8% from the field. In four years of high school, Garnett posted an impressive 2,553 points, 1,809 rebounds and 737 blocked shots. In high school, Garnett played alongside Ronnie Fields, who also became a professional basketball player. Garnett was named the Most Outstanding Player at the McDonald's All-American Game after registering 18 points, 11 rebounds, 4 assists and 3 blocked shots, and then declared himself eligible for the 1995 NBA draft. To mark the 35th anniversary of the McDonald's All-American High School Boys Basketball Game, Garnett was honored as one of 35 Greatest McDonald's All-Americans.  Garnett's decision not to play college basketball was influenced in part by his failure to score well enough on the ACT test to meet NCAA requirements for freshman eligibility. Garnett told Student Sports Magazine in 1995 that if he had attended college he would have chosen to play college basketball for the University of Maryland.

who were his parents?
Garnett's mother never married his father, O'Lewis McCullough, with their relationship ending shortly after his birth.