Brooklyn Nets big man Mason Plumlee is the clear NBA Rookie of the Year for 2014. The rookie was second on the Nets in total offensive rebounds and led the team in blocked shots. Also, Plumlee scored almost as many points per minute as Deron Williams (16 to 15 points/36 mins respectively).
Finally Mason posted an absurd 67% true shooting this year (2nd best in the NBA behind Brandan Wright). His true shooting percentage blew away the previous rookie record held by former Kansas City King Steve Johnson (64% TS in 1982).
As a 24 year-old rookie drafted 22nd overall Mason Plumlee may not get much better as an NBA player. But what he is right now is good enough to start on many teams and have a nice decade long run in The Association.