[1][2] He is the son of retired National Basketball Association (NBA) player Tim Kempton.

[3] A 6'10" center and power forward, Kempton played high school basketball at Brophy College Preparatory in Phoenix, Arizona.

[4] For college, he chose Lehigh, where as a freshman in 2013–14 he averaged 13.0 points and 7.1 rebounds per game and was named the Patriot League Rookie of the Year.

[7] On June 16, 2017, Kempton started his professional career with the Spanish team Bilbao Basket.

[9] Two days later, Kempton signed with the Israeli team Bnei Herzliya for the rest of the season.