Jack Wayne Sikma (born November 14, 1955) is an American retired basketball center.
He was a seven-time NBA All-Star with the Seattle SuperSonics, who drafted him in the first round with the eighth overall pick of the 1977 NBA draft.
In 1979, he won an NBA championship with Seattle.
Sikma finished his playing career with the Milwaukee Bucks.
He was elected to the Naismith Basketball Hall of Fame in 2019.
He was known for his distinctive curly, blond hair along with his trademark step back behind the head jumper during his playing days.
During his thirteen-year career, he reached the playoffs eleven times and anomalously established himself as accurate-shooting center.
His style of play would become significantly influential for centers at both the amateur and professional levels.