With your Center, you hope that he can give you a double-double on a somewhat regular basis. Sikma averaged that seven times as a SuperSonic all of which saw him go to the All Star Game.
Sikma was a rare Center in that he was an excellent Free Throw shooter (actually winning the Free Throw Percentage title once, though as a Milwaukee Buck), certainly helping to inflate his above average offensive numbers. Defensively, Sikma led the NBA in Defensive Win Shares twice.
This complete player was a vital component in one of the most complete NBA Championship teams, the 1978-79 Sonics team.
Any wonder why this is considered one of the biggest snubs in the Basketball Hall of Fame?