Boston Celtics don’t care about offensive rebounds. Should they?

The Celtics have not been getting a lot of offensive rebounds. Since 2007.
When a team is struggling, it’s easy to look at their Basketball-Reference page, find the area in which they are farthest behind other teams and point to that as their main problem. So when Boston began stumbling out of the gate, there was a popular statistical scapegoat, one that has been a well-publicized problem for several years: offensive rebounding.
On one hand, it makes sense. Offensive rebounds often lead to easy buckets, since the ball is usually recovered near the hoop. They can extend possessions and allow a team to settle into a better rhythm. And they can also be disheartening for an opponent who, having defended well enough to prevent the first shot from going in, now has to repeat their defensive performance for an entirely new possession.
So understand that I’m not discounting the importance of offensive rebounding. But here’s the thing: Boston discounts it. The Celtics LITERALLY DON’T CARE about offensive rebounding.
Since 2007, the Celtics have never been higher than 21st in offensive rebounds (and incidentally, that was 2009 when they didn’t make it past the second round of the playoffs) and three times, they have been dead last in that category. And it’s not totally about the personnel. Last season, the Celtics finished 30th in offensive rebounding, but were 15th on the defensive glass. Where did they finish overall? 30th in total rebounds. They got so few offensive rebounds, it dragged their total rebounds into the cellar, despite finishing 15th overall defensively. That doesn’t point to a team full of players that can’t grab boards after their own missed shots. It points to a team that prioritizes other things WAY above offensive rebounding. They. Don’t. Care. At all. And, despite the common narrative, that might not necessarily a bad thing.
Since the start of the KG-era, the C’s have been more than willing to sacrifice offensive rebounds to get back in position defensively, and it’s been a successful tactic. Let’s take a look at Monday night’s Chicago game for some evidence.
The Bulls are not a very successful transition team to begin with (0.95 ppp, 30th in the NBA). But the Celtics’ tactic of not bothering with offensive rebounds is geared towards stopping teams in transition. Here’s an example:
There are two important things to notice. First: The only Celtic who goes after the offensive board is Pierce, whose momentum from his floater has put him in an ideal situation to do so, directly under the basket. Second: The only Celtic who COULD have gone after the ball with him is Garnett, who is kind of hanging out on the left block. But as Pierce’s shot goes up, look how all of the other Celtics, including Garnett (this is important), are leaning:
It’s pretty evident that none of them are planning to fly to the hoop and try to salvage this play. Rather, they all seem to be either getting ready to run back or already in progress. At this point, they can see that Pierce’s shot isn’t going in, so we can safely assume they aren’t being prematurely confident.
So what are they trying to prevent? This.
Pierce isn’t as fast as Deng, so if Deng is going full-speed, Pierce isn’t going to catch him. Deng has too much of a headstart. Pierce is out of position and beaten on the play.
Fortunately, team defense is still very much a thing for the Celtics, even though it hasn’t been their strong suit so far this season. Instead of going for the rebound at first, Garnett immediately started back in case a situation such as this one developed. He turns in time to step in front of Deng, contesting and preventing an easy layup. So in this case, ignoring the missed shot and running back on defense was the correct decision.
It is certainly worth pointing out, in the interest of fairness, that this doesn’t always work for Boston. The Celtics are last in opponent PPP in transition so far this year. But offensive boards don’t lead exclusively to transition opportunities, and it’s important for the C’s to get their defense set up. It’s important for KG to get himself set, screaming instructions to his teammates. The Celtics thrive off their defense, not their offense. And even though the defense hasn’t been fantastic yet, it will almost certainly improve in part because the Celtics make a point of getting back.
So no matter how loudly we call for more dedication to the offensive boards and no matter how much we may wish that Jared Sullinger would make a big difference, the fact is that the Celtics, for better or worse, just don’t play that way. This isn’t a small sample size thing. It’s a Doc Rivers thing. It’s a “That’s how things have been done since 2007″ thing. And frankly, given how well things have gone over that five year span, maybe it’s ok if they stay the same.
Follow Tom on Twitter: @Tom_NBA.
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I just really hate it when smartazz writers write pieces explaining what we already know, because it’s obvious, seeming to berate fans for actually giving a crap about their team and daring to criticize. And this kind of crap is smarmy. If the Celtics brass justifies the Perk trade by ranting about “spacing”, you can count on the smartazzes to echo that for the next two years. Spacing spacing spacing spacing.
Look, offensive rebounding used to be one of the key stats that set good teams apart from lesser teams, or at least it was viewed that way. The game has changed so that offensive rebounds are probably not quite as important, but they are still important. Rivers hasn’t just given up on offensive rebounds. He decided to prioritize something different. That’s a choice between two priorities. It doesn’t mean that one isn’t an important thing just because it wasn’t chosen.
Eschewing offensive boards was probably a good choice for the Cs because of two reasons. Most importantly, the Big Three Celtics were an old team. They absolutely did not want to get into uptempo chases all night. That is the last thing they wanted. So it was a reasonable choice to forget about offensive rebounds in favor of getting back on D without exhausting one’s old self. Secondly, the Celtics chose to run a precision offense because of one Ray Allen. They committed to the idea that they were going to hit such a high percentage of their shots that they wouldn’t need offensive rebounds.
But it’s a tradeoff. In the play you cite here, KG was in good position for an offensive board. Had he fought for one, he might well have gotten it. There’s no better way to stop the opponent’s transition than to get an offensive rebound, and the mere act of contesting the rebound, if combined with contesting the outlet and the start of the transition, can slow down an opposing team’s transition anyway.
Doc made a choice. Did it work? Well, it did for one year. Has it worked since? Not so well. Our precision offense has become less effective over the years. We’ve needed to make smart decisions to go after offensive boards on a situational basis, and we probably haven’t done that enough. Doc and observers have failed to acknowledge that we are shifting from a precision team to an energy team in many ways. An energy team needs to hit the glass on both ends. They also need to be smart about it. We are becoming a younger, more athletic team, more in the image of Rajon Rondo and less in the image of Ray Allen.
So yeah, it’s time to hit the glass quite a bit harder. Fans are right to go after this point again and again.
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I agree with Paul: sacrificing OR for team defense made sense 2 years ago and last year. With Garnett at center, and after the injection of a number of (much) younger players the Cs shouldn’t be choosing between the two, but rather be pretty effective at both.
The more I think about it, the more I think Doc is not much af a coach. Sure, the vets love him, but just because he gives them a lot of playing time.All the rest (rotation, defense, offense) is lacklustre, at best.
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[...] Town Boston Celtics don’t care about offensive rebounds. Should they? – This philosphy is nothing knew for Doc’s squad, but is it the right [...]
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Have to agree with paul on his main points and will let the Perk trade pass without comment so as to not rehash something that happened several seasons ago. That said, offensive rebounding is a great way to get more shots, deny the opposing team a ‘free’ possession, and can be extremely effective in stopping fast breaks instead of defending them. Everyone knows I rant about rebounding since we were 23rd in 2010 (now last, same as last yr), and Doc needs to get schooled because sending 4 guys back and letting RR be the only rebounder is idiocy. Here’s a glaring example of why it’s important…In the Milw game they got 16 offensive rebs and had 15 more shots than the Cs. So we had to struggle to get a 4-pt win vs a mediocre team. Doc is not a defensive genius; Thibodeau was and we sorely miss him because since he left our rebounding has tanked. As I like to remind everyone – Pat Riley’s fav mantra during the Lakers title runs was “no rebounds, no rings”. Well it has to be on both ends of the court. We suck at this and need to change or we are doomed again from getting Banner #18. Go Cs…
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P.S. Maybe if we were better at it and focused on better rebounding (not just offensive, as giving up 16 off. rebs to Milw is just plain stupid) we could have won titles in 2010 and last year? Rebounding matters and being dead last isn’t going to cut it. So that’s why we bitch about it so much. We’re younger, stronger and bigger than last season so let’s use our skills and at least only send 2 back on defense instead of 4 or 5. Go Cs…
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on a 90s t-shirt I read:
you can shoot too much, you can dribble too much, you can even pass too much.
but you can’t possibly rebound too much.
wake up, Doc!
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