Interesting discussion.
I thought I'd add some background on what "lottery pick" really means. Here is a full list of all top 14 picks since 1980, ending in 2006 (not sure why, but that's OK, including more recent picks would complicate things because those guys' careers aren't fully formed yet):
http://www.nba.com/history/draft_top13.htmlTake a quick look at it, and ask how many guys overall, even guys taken in the top 5, have had equivalent or better careers than Rondo.
If you're interested in more detail, I've classified all players from those drafts as "franchise," "all-star" or "worse." This is somewhat subjective of course.
"Franchise" guys are those who I think are clearly better than Rondo and could be a #1 guy on a championship team.
By "all-star" I mean a guy whose credentials are comparable to Rondo's - a multiple-time all-star selection, with a few All-NBA or All-Defense selections. These guys are in my opinion fully capable of being a #2 on a championship team. For example Pau Gasol makes the list. Hersey Hawkins with his one All-Star selection does not.
"Worse" means worse than Rondo.
There are a total of 364 lottery selections during that time and here is how they rate out:
Franchise 27
All-Star 30 (or so, this is a grayer area)
Worse 307
So, just by the raw numbers a randomly chosen "lottery player" has a 7% chance of being better than Rondo, an 8% chance of being about the same and an 85% chance of being worse. I'm sure people can quibble with my classification around the margins, but the numbers are so heavily weighted toward "worse" that it won't matter a whole lot.
If you ask what the odds are with a given lottery *pick* it's much worse, because nearly all of the franchise and all-star players are taken in the top 3. Getting a "lottery pick" before the beginning of the season gives you, even from of the 3 worst teams in the league, maybe a 50% chance at a pick in the top 3. If it's a team expected to be in the 7-14 range you have virtually no shot at a franchise guy, and a very small chance at an "all-star."
Now, as others have argued, the quality of this particular draft is by most accounts better than others. That will swing the numbers, maybe significantly if you think there are 3-4 franchise guys and and 3-4 more "all-star" players. But the element of uncertainty there is still huge in terms of getting a "lottery pick" right now and hoping it ends up yielding a player better than Rondo.
And of course, between now and draft day the quality of the draft could change for the worse, for all kinds of reasons. More uncertainty.
What do we take away from all this? Here are my thoughts:
1. Trading Rondo *right now* for a pick that will probably be in the 7-14 range of the lottery will, even if this draft is historically good, almost certainly yield a player that ends up being worse than Rondo. I count 5 guys ever who ended up being better than him from that range, and maybe another 5-10 who are similar...out of 216 players taken.
2. A pick likely to be in the 3-5 range will, even if this draft is very good, need to be a real success to yield a player equal to or better than Rondo. Even in that range, even in good drafts, it might not be much better than a 50/50 to get a guy as good as Rondo.
3. Trading for a pick right now introduces so much uncertainty, and so many players taken in the lottery end up being worse than Rondo, that it is not a great move.
4. Waiting until later in the season, or even until after the lottery, might make it worthwhile, both because it would pin down the exact draft slot and because we'll learn a lot about the 2014 draft between now and then. Even then, assuming Rondo's at his previous level of play you'd want a pretty high pick.
There are other considerations, of course, including for example whether you think we need to get "equal value" back, which is one guiding principle in my discussion above. But I hope this adds some perspective.