In NBA history, only 20 players have ever had a rookie season in which they averaged 20 or more points and 10 or more rebounds per game. Of those 20, 14 are in the Hall of Fame. One of them, Blake Griffin, is still active. Another, Tim Duncan, won't have to wait long until he's inducted.
That leaves just four players with that caliber of a rookie season who haven't yet been enshrined in Springfield, Mass.: Terry Cummings, Elton Brand, Sidney Wicks, and a man who did it with the Pacers, Clark Kellogg.
Because chronic knee issues robbed Kellogg of his career's longevity — he played just five NBA seasons (260 games) — Kellogg never got a chance to build a serious case for the Hall of Fame.