Bobby Orr has gotten the most career hat tricks by a defenseman, with 9 hat tricks.

Interpreted as:

most career regular-season hat tricks by a defenseman

	NAME	HT	GP	G	A	P	+/-	PIM	PPG	PPA	SHG	SHA	GWG	OTG	S	S%	FOW	FO	FOW%	HIT	BKS	TKA	GVA	TOI/GP
1	Bobby Orr B. Orr	9	657	270	645	915	+582	953	76	248	16	31	26		3,058	8.8
2	Harry Cameron H. Cameron	6	129	88	54	142		180					15	3
3	Paul Coffey P. Coffey	5	1,409	396	1,135	1,531	+298	1,802	135	529	20	31	43	1	4,389	9.0	0	0		33	89	23	97	21:50
4	Denis Potvin D. Potvin	5	1,060	310	742	1,052	+456	1,356	127	332	10	22	44	0	3,050	10.2
5	Bert Corbeau B. Corbeau	4	258	63	48	111		665					7	0
6	Steve Duchesne S. Duchesne	3	1,113	227	525	752	+89	824	84	231	10	9	30	2	2,542	8.9	1	2	50.0	113	241	68	154	18:42
7	Al MacInnis A. MacInnis	3	1,416	340	934	1,274	+371	1,511	166	556	10	23	44	3	5,157	6.6	2	2	100.0	152	266	129	247	26:38
8	Reed Larson R. Larson	3	904	222	463	685	-128	1,388	88	185	8	9	17	0	2,926	7.6
9	Brad Park B. Park	3	1,113	213	683	896	+363	1,429	92	285	5	8	28	0	2,827	7.5
10	Eddie Gerard E. Gerard	3	128	50	51	101		126					3	0
11	Lubomir Visnovsky L. Visnovsky	2	883	128	367	495	+40	373	52	189	0	1	20	4	1,532	8.4	5	17	29.4	637	1,102	383	768	21:26
12	Sandis Ozolinsh S. Ozolinsh	2	875	167	397	564	-44	638	67	204	4	3	26	3	1,771	9.4	0	0		425	367	219	469	22:30
13	Mathieu Schneider M. Schneider	2	1,289	223	520	743	+66	1,245	100	293	4	4	36	4	3,092	7.2	1	8	12.5	1,003	975	319	475	22:44
14	Kevin Hatcher K. Hatcher	2	1,157	227	450	677	-26	1,392	91	208	8	16	37	2	2,947	7.7	0	0		195	222	59	103	22:09
15	Phil Housley P. Housley	2	1,495	338	894	1,232	-53	822	129	483	7	3	49	5	3,808	8.9	1	2	50.0	93	147	85	196	20:52
16	Ian Turnbull I. Turnbull	2	628	123	317	440	+23	736	33	105	4	4	10		1,971	6.2
17	Carol Vadnais C. Vadnais	2	1,087	169	418	587	-63	1,811	54	166	4	12	19		2,459	6.9
18	Doug Mohns D. Mohns	2	704	93	228	321	-121	631	30	89	5	3	13		1,248	7.5
19	Flash Hollett F. Hollett	2	560	132	181	313		358	14	35	2	6	20	2
20	Sprague Cleghorn S. Cleghorn	2	262	85	63	148		549					12	2
21	Ken Randall K. Randall	2	198	57	49	106		465					11	0
22	George Boucher G. Boucher	2	450	118	87	205		845					24	1
23	Dylan Coghlan D. Coghlan	1	112	6	16	22	-10	26	2	2	0	0	1	0	180	3.3	0	1	0.0	105	96	29	45	13:53
24	Cale Makar C. Makar	1	367	104	288	392	+122	106	37	129	2	3	23	5	1,026	10.1	0	0		330	503	276	260	24:43
25	Jakob Chychrun J. Chychrun	1	513	89	160	249	-49	338	32	41	0	0	13	3	1,225	7.3	0	0		604	790	177	408	21:16