In addition to Robertson, second-year big man Jerry Lucas rose to superstar status this season.
He joined Robertson on the All-NBA First Team named at the season's conclusion.
Key guard Arlen Bockhorn was lost to a career-ending injury in November.
The other four opening-day starters, Robertson, Lucas, Jack Twyman and Wayne Embry, were each lost for several games or more also.
But the same day's events saw superstar Wilt Chamberlain traded to the rival Philadelphia 76ers.