least runs allowed while pitching at least 50 ip all-time in a season

Rob Murphy has allowed the fewest runs with 50.0+ innings pitched in a season, with 4 runs in his rookie season in 1986.

Interpreted as:

least runs allowed by a player while pitching at least 50 ip all-time in a season

	NAME	R	IP	SEASON	TM	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	H	ER	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Rob Murphy R. Murphy	4	50.1	1986	CIN	34	6	0	1.000	0	0.72	36	0	0	1	26	4	0	21	0	12	2	195	5	6.44	3.75	1.71	0.00	18.5	10.8	0.93	.188	0.72	19	2.58	67	4.65	7
2	Chris Martin C. Martin	6	51.1	2023	BOS	55	4	1	.800	0	1.05	46	0	0	3	45	6	2	8	0	12	3	199	1	8.06	1.40	5.75	0.35	23.1	4.0	1.03	.301	1.05	23	2.43	56	7.89	10.7
3	Cla Meredith C. Meredith	6	50.2	2006	SDP	45	5	1	.833	0	1.07	37	0	0	0	30	6	3	6	2	11	3	185	0	6.57	1.07	6.17	0.53	20.0	3.2	0.71	.197	1.07	26	2.92	67	5.33	8.2
4	Zack Britton Z. Britton	7	67.0	2016	BAL	69	2	1	.667	0	0.54	74	0	0	47	38	4	1	18	0	63	3	254	10	9.94	2.42	4.11	0.13	29.1	7.1	0.84	.230	0.94	13	1.93	44	5.10	17.7
5	Craig Kimbrel C. Kimbrel	7	62.2	2012	ATL	63	3	1	.750	0	1.01	116	0	0	42	27	7	3	14	2	56	0	231	5	16.66	2.01	8.29	0.43	50.2	6.1	0.65	.250	1.01	26	0.77	20	3.88	21.6
6	Earl Hamilton E. Hamilton	7	54.0	1918	PIT	6	6	0	1.000	6	0.83	20	6	1	0	47	5	0	13	0	0		210	1	3.33	2.17	1.54	0.00	9.5	6.2	1.11	.266	1.17	30	2.21	80	7.83	3.3
7	Ryne Stanek R. Stanek	8	54.2	2022	HOU	59	2	1	.667	0	1.15	62	0	0	1	36	7	2	31	0	10	1	224	4	10.21	5.10	2.00	0.33	27.7	13.8	1.23	.264	1.32	30	3.01	77	5.93	5.4
8	Josh Hader J. Hader	8	58.2	2021	MIL	60	4	2	.667	0	1.23	102	0	0	34	25	8	3	24	2	42	0	224	3	15.65	3.68	4.25	0.46	45.5	10.7	0.84	.237	1.23	29	1.68	39	3.84	16.8
9	Wade Davis W. Davis	8	67.1	2015	KCR	69	8	1	.889	0	0.94	78	0	0	17	33	7	3	20	0	24	1	251	1	10.43	2.67	3.90	0.40	31.1	8.0	0.79	.200	1.07	23	2.28	58	4.41	12.7
10	Wade Davis W. Davis	8	72.0	2014	KCR	71	9	2	.818	0	1.00	109	0	0	3	38	8	0	23	3	11	0	279	1	13.63	2.88	4.74	0.00	39.1	8.2	0.85	.264	1.00	25	1.18	32	4.75	20.7
11	Drew Storen D. Storen	8	56.1	2014	WSH	65	2	1	.667	0	1.12	46	0	0	11	44	7	2	11	3	18	3	224	4	7.35	1.76	4.18	0.32	20.5	4.9	0.98	.259	1.28	31	2.70	74	7.03	6
12	Neal Cotts N. Cotts	8	57.0	2013	TEX	58	8	3	.727	0	1.11	65	0	0	1	36	7	2	18	0	6	1	223	3	10.26	2.84	3.61	0.32	29.1	8.1	0.95	.246	1.26	26	2.17	53	5.68	11.8
13	Hung-Chih Kuo H. Kuo	8	60.0	2010	LAD	56	3	2	.600	0	1.20	73	0	0	12	29	8	1	18	1	16	0	229	3	10.95	2.70	4.06	0.15	31.9	7.9	0.78	.206	1.20	31	1.80	46	4.35	14.3
14	Brad Ziegler B. Ziegler	8	59.2	2008	OAK	47	3	0	1.000	0	1.06	30	0	0	11	47	7	2	22	1	21	3	229	0	4.53	3.32	1.36	0.30	13.1	9.6	1.16	.259	1.21	25	3.71	88	7.09	3.5
15	Jonathan Papelbon J. Papelbon	8	68.1	2006	BOS	59	4	2	.667	0	0.92	75	0	0	35	40	7	3	13	1	49	2	257	2	9.88	1.71	5.77	0.40	29.2	5.1	0.78	.224	1.05	20	2.13	48	5.27	17.7
16	Dennys Reyes D. Reyes	8	50.2	2006	MIN	66	5	0	1.000	0	0.89	49	0	0	0	35	5	3	15	0	8	2	194	4	8.70	2.66	3.27	0.53	25.3	7.7	0.99	.252	1.42	20	2.86	65	6.22	8.7
17	Calvin Schiraldi C. Schiraldi	8	51.0	1986	BOS	25	4	2	.667	0	1.41	55	0	0	9	36	8	5	15	1	21	2	198	1	9.71	2.65	3.67	0.88	27.8	7.6	1.00	.254	1.41	33	2.82	69	6.35	7.2
18	Frank Williams F. Williams	8	52.1	1986	SFG	36	3	1	.750	0	1.20	33	0	0	1	35	7	0	21	4	12	4	194	1	5.68	3.61	1.57	0.00	17.0	10.8	1.07	.257	1.38	34	2.93	79	6.02	4.5
19	Nick Maddox N. Maddox	8	54.0	1907	PIT	6	5	1	.833	6	0.83	38	6	1	0	32	5	0	13	4	0		197	1	6.33	2.17	2.92	0.00	19.3	6.6	0.83	.225	1.33	34	1.72	65	5.33	5.5
20	Edwin Díaz E. Díaz	9	62.0	2022	NYM	61	3	1	.750	0	1.31	118	0	0	32	34	9	3	18	2	49	1	235	2	17.13	2.61	6.56	0.44	50.2	7.7	0.84	.330	1.31	34	0.90	23	4.94	21.2
21	Aaron Loup A. Loup	9	56.2	2021	NYM	65	6	0	1.000	2	0.95	57	0	0	0	37	6	1	16	4	6	0	218	0	9.05	2.54	3.56	0.16	26.1	7.3	0.94	.257	1.43	24	2.44	58	5.88	11.2
22	Huston Street H. Street	9	59.1	2014	TOT	61	2	2	.500	0	1.37	57	0	0	41	42	9	4	14	0	51	3	229	0	8.65	2.12	4.07	0.61	24.9	6.1	0.94	.247	1.37	38	2.79	77	6.37	5.7
23	Fernando Rodney F. Rodney	9	74.2	2012	TBR	76	2	2	.500	0	0.60	76	0	0	48	43	5	2	15	3	65	1	282	4	9.16	1.81	5.07	0.24	27.0	5.3	0.78	.220	1.08	16	2.12	52	5.18	16.2
24	Eric O'Flaherty E. O'Flaherty	9	73.2	2011	ATL	78	2	4	.333	0	0.98	67	0	0	0	59	8	2	21	3	5	8	301	1	8.19	2.57	3.19	0.24	22.3	7.0	1.09	.274	1.10	26	2.53	67	7.21	10.3
25	David Robertson D. Robertson	9	66.2	2011	NYY	70	4	0	1.000	0	1.08	100	0	0	1	40	8	1	35	1	8	6	272	6	13.50	4.72	2.86	0.14	36.8	12.9	1.13	.289	1.21	26	1.83	44	5.40	17