Dutch Leonard has the most career no-hitters for the Red Sox, with 2.

Interpreted as:

most regular-season no hitters by a player in red sox history

	NAME	NH	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Dutch Leonard D. Leonard	2	211	90	64	.584	161	2.13	771	96	25	11	1361.0	1,132	322	426	16	418	48	41		5,504	31	5.10	2.76	1.84	0.11	14.0	7.6	1.14	.263	2.82	7.49
2	Clay Buchholz C. Buchholz	1	206	81	61	.570	188	3.96	899	9	6	0	1167.2	1,104	514	565	116	417	45	7	9	4,920	28	6.93	3.21	2.16	0.89	18.3	8.5	1.30	.287	4.35	8.51
3	Jon Lester J. Lester	1	242	110	63	.636	241	3.64	1,386	10	3	0	1519.1	1,426	615	655	138	529	55	0	4	6,378	38	8.21	3.13	2.62	0.82	21.7	8.3	1.29	.302	3.88	8.45
4	Hideo Nomo H. Nomo	1	33	13	10	.565	33	4.50	220	2	2	0	198.0	171	99	105	26	96	3	0	2	849	6	10.00	4.36	2.29	1.18	25.9	11.3	1.35	.288	4.77	7.77
5	Derek Lowe D. Lowe	1	384	70	55	.560	111	3.72	673	2	1	85	1037.0	1,024	429	488	69	312	48	154	27	4,389	26	5.84	2.71	2.16	0.60	15.3	7.1	1.29	.291	4.24	8.89
6	Dave Morehead D. Morehead	1	128	35	56	.385	115	4.17	525	18	6	0	664.2	581	308	344	62	373	11	4	5	2,924	29	7.11	5.05	1.41	0.84	18.0	12.8	1.44	.266	4.66	7.87
7	Earl Wilson E. Wilson	1	174	56	58	.491	156	4.10	715	30	6	0	1024.1	950	467	523	123	481	15	11	16	4,443	54	6.28	4.23	1.49	1.08	16.1	10.8	1.40	.266	4.60	8.35
8	Bill Monbouquette B. Monbouquette	1	254	96	91	.513	228	3.69	969	72	16	1	1622.0	1,649	665	755	180	408	10	8	31	6,824	14	5.38	2.26	2.38	1.00	14.2	6.0	1.27	.279	4.19	9.15
9	Mel Parnell M. Parnell	1	289	123	75	.621	232	3.49	732	113	20	10	1753.0	1,715	680	796	104	758	28	36		7,546	41	3.76	3.89	0.97	0.53	9.7	10.0	1.41	.272	4.09	8.80
10	Howard Ehmke H. Ehmke	1	136	51	64	.443	120	3.83	368	83	7	8	989.0	1,044	421	504	32	328	44	13		4,304	9	3.35	2.98	1.12	0.29	8.6	7.6	1.39	.287	4.59	9.50
11	Rube Foster R. Foster	1	138	58	33	.637	103	2.36	293	60	15	3	841.1	726		301	6	304	30	27			19	3.13	3.25	0.96	0.06		8.8	1.22	.255	3.22	7.77
12	Joe Wood J. Wood	1	218	117	56	.676	157	0.69	996	121	28	8	1415.0	1,112		485	10	413	52	53			43	6.33	2.63	2.41	0.06		7.3	1.08	.262	3.08	7.07
13	Cy Young C. Young	1	36	21	11	.656	33		158	30	3	2	298.1	228		68	1	34	2	3		1,133	4	4.77	1.03	4.65	0.03	13.9	3.0	0.88	.242	2.05	6.88