Statistical Analysis. Humor. Knicks.

Tuesday, September 2, 2014

The Best & Worst Offenses & Defenses

I dragged this lake looking for corpses
Dusted for prints, pried up the floorboards
Pieces of planes and black box recorders
Don’t lie

– “Private Eye”
Alkaline Trio

If you wanted to know quickly which teams had the best & worst offense & defense in the league, you might go to ESPN.com NBA stats page. You can click on the team-by-team comparison link and you’d see which teams have scored and given up the most points. You can sort the teams by a few different stats, and for this example you might use points scored per game and opponents points scored per game. So according to this you might conclude the best NBA offenses are:

Rank	Type	Pts
1	SAC	104.6
2	DAL	103.3
3	SEA	97.8
4	LAL	97.6
5	MIL	97.1
6	DEN	97
7	MEM	97
8	LAC	96.5
9	MIN	95.5
10	ORL	94.9
11	BOS	94.6
12	GS	94.4
13	PHO	93.6
14	CLE	92
15	POR	92
16	NO	91.9
17	NYK	91
18	NJ	90.7
19	WAS	90.6
20	SAS	90.1
21	IND	89.8
22	ATL	89.7
23	CHI	89.6
24	PHI	89.6
25	DET	89.6
26	UTA	88.9
27	HOU	88.3
28	MIA	88
29	TOR	84.9

And the best defenses:

Rank	Type	Pts
1	SAS	83.9
2	IND	84.9
3	HOU	85.1
4	NJ	86.5
5	DET	87
6	TOR	87.3
7	MIA	89.4
8	MIN	90
9	UTA	90.6
10	PHI	91.2
11	NO	91.8
12	NYK	92.6
13	POR	93.6
14	LAL	94
15	MEM	94.4
16	GS	95.2
17	ATL	95.2
18	DEN	95.3
19	CLE	95.3
20	MIL	95.4
21	CHI	95.7
22	WAS	96.2
23	BOS	96.6
24	PHO	97.2
25	SAC	97.3
26	SEA	98.8
27	LAC	98.8
28	DAL	99.8
29	ORL	100.7

But if you’ve ever seen an NBA game, you know some teams’ offenses are faster than others. This is because some teams like to run down the shot clock because they want to slow the tempo, where others like to take the first or second available open shot, because their offense is good enough to get an efficient shot off quickly. A team like Dallas or Sacramento would have more chances to score than let’s say Miami or Toronto. So the team that scores the most points in a game may not have the best offense in the league, because they simply might have the fastest offense in the league.

Well some smart people have already thought about this. They said, maybe instead of looking at how many points are scored per game, we should see how many points are scored per possession (or 100 possessions). Unfortunately the people at ESPN have never thought to ask this question, or at least have not thought it important enough to put it on their stat page. Luckily the good people at 82games.com have. You can’t sort the teams all nice like the ESPN page, and they don’t even have a page where all the teams are displayed. They only have the information by team pages. But with some patience, a good spreadsheet program, and 10 minutes of free time, you can do some quick analysis yourself.

So here we are, the best offenses in the NBA, by points per 100 possessions (pPts):

Rank	Type	Pts	Poss	pPts	OldRank	DRANK
1	SAC	104.6	91	114	1	+0
2	DAL	103.3	91	112	2	+0
3	SEA	97.8	89	109	3	+0
4	MIN	95.5	87	109	9	+5
5	LAL	97.6	90	108	4	-1
6	MIL	97.1	90	107	5	-1
7	MEM	97	90	107	6	-1
8	LAC	96.5	90	107	8	+0
9	POR	92	86	107	14	+5
10	DEN	97	91	106	7	-3
11	ORL	94.9	89	106	10	-1
12	GS	94.4	89	106	12	+0
13	NO	91.9	88	104	16	+3
14	IND	89.8	86	104	21	+7
15	UTA	88.9	85	104	26	+11
16	BOS	94.6	91	103	11	-5
17	PHO	93.6	91	103	13	-4
18	NJ	90.7	88	103	18	+0
19	SAS	90.1	87	103	20	+1
20	DET	89.6	86	103	23	+3
21	HOU	88.3	85	103	27	+6
22	MIA	88	85	103	28	+6
23	CLE	92	90	102	15	-8
24	NYK	91	89	102	17	-7
25	PHI	89.6	87	102	24	-1
26	WAS	90.6	90	100	19	-7
27	ATL	89.7	90	99	22	-5
28	CHI	89.6	90	99	25	-3
29	TOR	84.9	85	99	29	+0

The first team that jumps into the top 5, that wasn’t there before, is the Timberwolves at #4. Even though they only score 95.5 points a game, they would score 109 points if given 100 possessions. They just play at a slow pace of only 87 offensive possessions per game. (The average pace is 88.4 possessions/game). Portland also jumps into the top 10, while Utah & Indy move into the middle from the bottom 10. The big losers are Cleveland, Washington, and my own beloved Knicks, who drop to 6th worst.

Now for the defenses:

Rank	Type	Pts	Poss	pPts	OldRank	Diff
1	SAS	83.9	87	96	1	+0
2	IND	84.9	86	98	2	+0
3	NJ	86.5	88	98	4	+1
4	HOU	85.1	85	100	3	-1
5	DET	87	86	100	5	+0
6	TOR	87.3	85	102	6	+0
7	MIN	90	88	102	8	+1
8	LAL	94	90	103	14	+6
9	PHI	91.2	87	104	10	+1
10	NO	91.8	87	104	11	+1
11	NYK	92.6	89	104	12	+1
12	MEM	94.4	90	104	15	+3
13	DEN	95.3	91	104	18	+5
14	MIA	89.4	85	105	7	-7
15	MIL	95.4	90	105	20	+5
16	UTA	90.6	85	106	9	-7
17	GS	95.2	89	106	16	-1
18	ATL	95.2	89	106	17	-1
19	CLE	95.3	89	106	19	+0
20	CHI	95.7	90	106	21	+1
21	WAS	96.2	90	106	22	+1
22	BOS	96.6	91	106	23	+1
23	SAC	97.3	91	106	25	+2
24	PHO	97.2	90	107	24	+0
25	POR	93.6	86	109	13	-12
26	DAL	99.8	91	109	28	+2
27	SEA	98.8	89	110	26	-1
28	LAC	98.8	90	110	27	-1
29	ORL	100.7	89	112	29	+0

Not much difference here among the top teams. The Lakers move into the top 10. Meanwhile Miami and Utah drop out of the top 10 into the middle of the pack, while Portland takes the biggest dip to the 5th worst defense in the league.

Unfortunately it’s hard to judge the Knicks current team using these tools. The team has experienced a large turnover in their roster. These stats are for the Knicks over the entire year, which includes players like Van Horn, Charlie Ward, as well as Marbury and Penny Hardaway. However we can use it to learn a bit about tonight’s opponents, the Kings. The Kings are the team’s top scoring offense both by points per game, and by points per possession. Their 91 possessions/game tell you that they have one of the league’s fastest paced offense. Their defense is lacking, 7th worst in the league.

So then you might ask, if they have a great offense and a poor defense, shouldn’t they be an average team? Not necessarily. If anything they might be a little bit better, since their Pythagorean expected wins says they should have about 1 or 2 more wins, based on their points for/against. However, you can look at the offensive numbers above, and realize that they are a LOT better offensively than most teams. The difference between them and the #5 Lakers, is 6 points (per hundred possessions). This is the same difference between the #5 Lakers and #23 Cleveland.

So the Kings’ offense is very good, which is why they have the best record in the league.