I don't take you for a fool twslam, I just asked you to explain your reasoning to me which you did. And I appreciate it! I have a lot better idea where you're coming from now and I'll even meet you halfway:
The odds are in your favor that Danny Green will be a better player than Ben McLemore next season and probably even the season after that.
Here's why I don't think that matters: investing in players means more than simply writing a check, it means working with them to build on their strengths and it means committing the time necessary for development to take place. Signing Danny Green for $13 million a year not only ties up a substantial portion of our salary cap which we would no longer have to upgrade our woeful frontcourt rotation, it also means pushing Ben to the side and cutting his minutes at the exact point in his career where he's actually ready for a bigger role.
Looking at the numbers you posted, here's my analysis of the differences...
Most of the ways in which Danny Green is "better" than Ben McLemore this year are counting stats.
PPG
Both of them average about 11 shots per 36 minutes (11.6 vs 11.1) and both of them average about 2 FTs per 36 min (2.0 vs 2.1) and both are shooting nearly the same percentage from the field (.436 vs .435). Danny Green is slightly better in FT % (.874 vs .818) but at 2 free throws per game it doesn't equate to a big difference (Green has made 111 this season on 127 attempts, McLemore has made 126 on 154 attempts). So when it says that Danny Green scores 21.1 points per 100 possessions and Ben McLemore scores 18.6 points per 100 possessions what is that actually saying? The difference is directly correlated to three point shooting. Is Danny Green a better scorer? He's a better three point shooter, or at least he was this season. In nearly every other way they're the same from a scoring point of view. How significant is that gap? It matters to me that Ben did average 42% from three as well for the first 30 games of the season. Reliability is certainly important, but remember I'm only concerned about predicting future success. A 21 year old player shooting 42% from three for about a third of the season is somebody I don't want to give up on as a three point threat. Not yet. If he's still inconsistent 2 years from now, that's another story.
RPG
Danny Green has a decided advantage in this area, but doesn't it matter that McLemore is playing alongside the #3 rebounder in the league and nobody on San Antonio averaged even 10 rebounds a game this season? Going even further, without a missed shot there's no defensive rebound so there's a finite number of opportunities per game. San Antonio's opponents took 83.7 shots per game and made 44% of them. Sacramento's opponents took 86.5 shots per game and made 46% of them. So both teams had about 47 missed shots that could potentially turn into defensive rebounds. Let's see how they were divided. On Sacramento, Ben mostly played with Cousins, Thompson, Gay, and Collison who grabbed 30.6%, 21.4%, 13.7%, and 8.7% of available defensive rebounds for a total of 74.4%. Add Ben's 8.6% and you get 83%. The rest, presumably, were divided among the bench players. In San Antonio, the most used lineup featured Duncan, Diaw, Leonard, and Parker alongside Green and they grabbed 26.6%, 15.1%, 20.5%, and 6.6% for a total of 68.8%. Add Danny Green's 14% and you get 82.8%. So with the same amount of available rebounds, both starting lineups performed nearly identically as a group. Does adding Danny Green to our lineup suddenly make us a better rebounding team or does he simply take one or two boards away from somebody else? Over the course of a season the difference in their stat lines was about 1 rebound per game. So is 7.6 a bigger number than 4.5? Sure. Does it significantly impact team performance? I don't think so.
APG
What are the ingredients needed to make an assist? A pass that leads to a made FG is the only play that gets credited with an assist. San Antonio took 83.6 shots per game this year and made .468% of them (third in the league). Sacramento took 80.7 shots per game this year and made .455% of them (tied for 13th). In addition, San Antonio shot 21.4 free throws per game. Sacramento led the league with 29.3 free throws per game (and no other team was even close to that -- Houston was #2 with 26 per game). Passes which result in free throws don't usually get credited as assists (unless there's a three point play). Before we even start to look at individual players, San Antonio clearly has more opportunities to register assists as a team. Looking now at assists per 100 possessions for
San Antonio and
Sacramento, the numbers overall are bigger on San Antonio. They have Ginobili (9.4), Parker (8.8), Cory Joseph (6.6), Diaw (6.0), Duncan (5.2), Leonard (4.1) and Splitter (3.9) all averaging more assists than Danny Green. On Sacramento you have Collison (8.1), McCallum (6.5), Cousins (5.3), Gay (5.2), Casspi (3.6) and Stauskas (2.9) averaging more assists than McLemore. Obviously I skipped players with small sample sizes. What's apparent to me is that San Antonio overall is better at generating assisted baskets and Danny Green's role as a facilitator in that offense is not any more significant than McLemore's role as a facilitator in our offense.
SPG & BPG
First of all, Ben is not now nor will he ever be a shotblocking threat in the NBA. That's an advantage that Danny Green has that's irrefutable. You're telling me that Danny Green is a full steal per 100 possessions better than McLemore and that doesn't add up to me based on what I've seen so I looked at their monthly splits
[Ben ,
Danny] and here's what I found:
......Ben
.......[Oct 0.5 / Nov 0.6 / Dec 0.6 / Jan 0.9 / Feb 1.0 / March 1.2 / April 1.8]
......Danny
.. [Oct 0.5 / Nov 1.4 / Dec 1.5 / Jan 1.4 / Feb 1.2 / March 1.3 / April 0.4]
So Danny Green is consistently around 1.4 steals per game, which is what you'd expect from a 6 year veteran. McLemore, on the other hand, was on a steady upward trajectory all season from poor to mediocre, to good, to great. When I look at this I don't see one player who's much better in this area, I see a steady veteran who contributes a solid 1.4 steals per game and an inconsistent youngster who's likely to level out at around the same level.
...
But then you're talking about "statistical models" and "confidence intervals" which leads me to believe that you think there's a right answer to be found here and I couldn't disagree more. There is no right answer. You can tell me what the odds are on a dice roll (or to pick a more appropriate analogy, an NBA lotto draw) but it's nothing but a mathematical approximation of events which may or may not take place. McLemore either will continue to develop or he won't. I don't think there's any simulation you can run which tells you the truth about that, you just have to wait and see. You haven't discredited my evaluation of each player's talent level, you've compared a 27 year old 6th year player to a 21 year old 2nd year player and found some slight statistical advantages with the former. Can't you see that the differences you're looking at here are incremental ones that are entirely consistent with an extra 4 years of NBA development time?
All of this is a shell game though. At the broadest level what we have here are two similar types of players. Let's not pretend Danny Green is anything more than a fourth option spot-up shooter and wing defender. That's exactly who Ben was for us this year. Danny Green is further along in his development than Ben is, but he's not a dramatically different kind of player. All I was intending to demonstrate is that the huge talent gap you see is a lot closer than you think it is. If we're going to commit $13 million a year to one player I'd rather not brush aside a 22 year old version of the same player in the process while leaving other significant holes in the roster unaddressed. If this is MLB and we're a big market team like the Dodgers or Red Sox than you can just throw as much money as you want at a problem. In the NBA with a salary cap, you have to be a little more prudent than that about how you divy up your limited resources (and don't think the salary cap going up changes this basic fact either -- the max salaries of players we can't afford to lose like Cousins will be going up accordingly).
Is there some risk involved? Sure. There always is. But if I'm overlooking the risk that Ben doesn't develop at all, as you say, than you're overlooking the much more significant risk of signing a veteran player to a $52 million dollar 4 year deal vs. sticking with the player we currently have for $7 million guaranteed over the next 2 years. If Ben doesn't progress this year, we need to find a player. If Danny Green regresses outside of the San Antonio system or suffers an injury or simply declines due to wear and tear, not only do we need to find another SG but we now have nearly $40 million dollars worth of dead weight on our salary cap. Sortof like the situation we found ourself in with Carl Landry, Marcus Thornton, Chuck Hayes, John Salmons, Shareef Abdur-Rahim, and Kenny Thomas. I feel better about betting on McLemore's talent than I feel about committing substantial salary cap space to yet another mid-tier veteran.
And lastly, it's become popular around here to use DeMarcus Cousins as the skapegoat for every knee-jerk overreaction. We need to sell our draft pick because Cousins gon' blow. We need to hire George Karl right now because Cousins gon' blow. We need to trade Collison for Dragic or Deron Williams because Cousins gon' blow. This has got to stop people! If you don't have a legit reason for making a decision, you don't get to blame it on the ticking Cousins bomb. You know why teams like Minnesota try and fail for years to build around a Kevin Garnett or Kevin Love? Because every year they make knee jerk overreactions of this kind which lead to an endless stream of mediocre veteran signings and counter-productive rationalizations like "we can't fit Cousins into our frontcourt and let him take shots away from Love, we need to draft a wing instead ". If Minnesota had simply drafted better players and developed them with the 4 top 10 picks they had between 2009 and 2011 they would be a playoff team right now, not the worst team in the league. I refuse to let the fear of a hypothetical Cousins mutiny scare me into making poor long-term decisions.