Billy Smith had the best save percentage by a goalie against a team in the 1981 playoffs with 4+ games played, at .915 versus the Rangers in the 1981 playoff series.

best save percentage by a player vs one team in a single postseason with at least 4 games played in 1981

	NAME	SV%	GP	OPP	SEASON	TM	W	L	SA	SV	GA	GAA	SHO	MIN
1	Billy Smith B. Smith	.915	4	Rangers	1980-81	NYI	4	0	94	86	8	2.00	0	240
2	Gilles Meloche G. Meloche	.907	5	Flames	1980-81	MNS	3	2	151	137	14	2.81	0	299
3	Pat Riggin P. Riggin	.907	6	North Stars	1980-81	CGY	2	3	193	175	18	3.30	0	327
4	Steve Baker S. Baker	.904	4	Kings	1980-81	NYR	3	1	114	103	11	2.93	0	225
5	Rick St. Croix R. St. Croix	.903	6	Flames	1980-81	PHI	3	3	176	159	17	2.86	1	357
6	Pat Riggin P. Riggin	.902	5	Flyers	1980-81	CGY	4	1	193	174	19	3.80	0	300
7	Gilles Meloche G. Meloche	.894	4	Sabres	1980-81	MNS	3	1	132	118	14	3.27	0	257
8	Greg Millen G. Millen	.893	5	Blues	1980-81	PIT	2	3	178	159	19	3.51	0	324
9	Billy Smith B. Smith	.887	5	North Stars	1980-81	NYI	4	1	141	125	16	3.21	0	299
10	Don Edwards D. Edwards	.885	5	North Stars	1980-81	BUF	1	4	182	161	21	4.02	0	314
11	Dan Bouchard D. Bouchard	.879	5	Flyers	1980-81	QUE	2	3	157	138	19	3.99	1	286
12	Mike Liut M. Liut	.878	5	Penguins	1980-81	STL	3	2	172	151	21	3.88	0	325
13	Billy Smith B. Smith	.876	5	Oilers	1980-81	NYI	3	2	121	106	15	3.11	0	289
14	Steve Baker S. Baker	.857	6	Blues	1980-81	NYR	4	2	154	132	22	3.68	0	359
15	Andy Moog A. Moog	.851	6	Islanders	1980-81	EDM	2	4	174	148	26	4.52	0	345
16	Mario Lessard M. Lessard	.837	4	Rangers	1980-81	LAK	1	3	123	103	20	5.48	0	219
17	Mike Liut M. Liut	.836	6	Rangers	1980-81	STL	2	4	177	148	29	4.83	0	360
18	Steve Baker S. Baker	.805	4	Islanders	1980-81	NYR	0	4	113	91	22	5.50	0	240