Jack Wayne Sikma (born November 14 1955 in Kankakee, Illinois) is an American former NBA Basketball Center (basketball).
Sikma played at Illinois, where he became a member of the Sigma Chi Fraternity. He was NBAed eighth overall in 1977 by the Seattle SuperSonics, Sikma was named to the NBA. Among his notable career achievements are his seven NBA selections (from 1979 to 1985) and his NBA ring won with the 1978-1979 Sonics, where Sikma teamed with talented players such as Dennis Johnson, Gus Williams and an aging Paul Silas. Sikma always averaged double figures in points-per-game throughout his career, and after his stint with the Sonics, he maintained consistent numbers while playing with the Milwaukee Bucks in his final five seasons. For his career, Sikma scored 17,287 points and grabbed 10,816 rebounds.
Sikma was one of the most accurate shooting centers in NBA history. He holds the rare distinction of leading the league in free throw percentage (92.2%) while playing the center position during the 1987-88 season and averaged 84.9% for his career. Sikma also made over 200 three-pointers during his career with a 32.8% three-point percentage.
Along with his accurate shooting, Sikma led the NBA in defensive rebounds in both 1981-82 and 1983-84 while playing in Seattle.
Sikma later served as an assistant coach with the SuperSonics.
Sikma's son, Luke, is currently a forward for the University of Portland Pilots.
In June 2007, Sikma was hired by the Houston Rockets as an assistant coach to Rick Adelman. Among his duties will be to tutor Yao Ming in "big man" playing strategies.