David Lee's best statistical season was in 2006-07.
Year FG% FT% Off R Def R RPG Ast TO Stl Blk PF PPG
05-06 59.6 57.7 1.6 2.9 4.5 0.6 0.8 0.5 0.3 1.9 5.2
06-07 60 81.5 3.4 7 10.4 1.8 1.6 0.8 0.4 2.7 10.7
07-08 55.2 81.9 3 6 8.9 1.2 1.2 0.7 0.4 2.6 10.8
08-09 48.5 69.6 1.5 4.6 6.1 1.9 1.6 0.9 0.3 3.1 10.3
He shot his highest FG%, came close to his FT% high, had his high is RPG, came very close to his APG and SPG high (both barely higher this season so who knows), and came very close to his PPG high.
Lee is obviously a young player and could very well improve, but his numbers seem to be consistent in that he is not quite a double-double guy. He had that one season, which to me looks like more of an aberration than anything at this point.
The more I think about it, the more I dislike keeping him long term because of the salary he'll command. And if the team is going to let him walk, doesn't it make sense to do a Lee, Curry, Rose for Marion deal? The Knicks would have a shot to make a little noise this year and decide if Marion is worth keeping or not, but regardless, get out of Curry monstrous deal.
Irregardless of that deal though, I'm suspecting 10 and 10 with Lee's obvious flaws are the best the team can expect.