Fred Toney has the best career ERA for the Reds, with an ERA of 2.18.

Interpreted as:

lowest era with a minimum of 750 IP for a reds pitcher

	NAME	ERA	IP	G	W	L	W%	GS	SO	CG	SHO	SV	H	ER	R	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	Fred Toney F. Toney	2.18	999.0	141	61	49	.555	122	409	79	17	6	855	242	324	14	259	17	15		4,006	12	3.68	2.33	1.58	0.13	10.2	6.5	1.12	.254	2.92	82	2.50	95	7.70	15.6
2	Bob Ewing B. Ewing	2.37	2020.1	252	108	103	.512	228	884	184	15	4	1,831	531	805	24	513	48	24		8,011	42	3.94	2.29	1.72	0.11	11.0	6.4	1.16	.276	3.59	83	2.49	85	8.16	106.9
3	Will White W. White	2.51	1832.1	208	136	69	.663	208	467	204	23	0	1,686	511	835	45	323		0		7,693	94	2.29	1.59	1.45	0.22	6.1	4.2	1.10	.242	4.10	79	3.52	112	8.28	-78.5
4	Noodles Hahn N. Hahn	2.52	1987.1	237	127	92	.580	225	900	209	24	0	1,878	556	799	27	375	49	11		7,962	28	4.08	1.70	2.40	0.12	11.3	4.7	1.13	.280	3.62	73	2.66	77	8.50	178.4
5	Hod Eller H. Eller	2.62	863.0	160	60	40	.600	89	381	52	9	5	806	251	313	19	213	18	58		3,523	5	3.97	2.22	1.79	0.20	10.8	6.0	1.18	.272	3.26	92	2.68	93	8.41	13.6
6	Pete Schneider P. Schneider	2.65	1245.0	200	59	85	.410	153	476	84	10	4	1,180	366	527	15	476	49	35		5,241	14	3.44	3.44	1.00	0.11	9.1	9.1	1.33	.276	3.81	98	2.98	111	8.53	-41
7	Harry Gaspar H. Gaspar	2.69	825.1	143	46	48	.489	98	228	48	11	13	795	247	333	15	217	39	38		3,310	7	2.49	2.37	1.05	0.16	6.9	6.6	1.23	.277	3.63	90	3.06	102	8.67	-7.4
8	Clay Carroll C. Carroll	2.73	856.0	486	71	43	.623	15	460	0	0	119	822	260	300	36	307	26	282	83	3,620	20	4.84	3.23	1.50	0.38	12.7	8.5	1.32	.282	3.15	77	3.14	91	8.64	29.5
9	Art Fromme A. Fromme	2.74	888.2	138	49	50	.495	109	387	59	8	2	769	271	373	20	328	34	21		3,614	18	3.92	3.32	1.18	0.20	10.7	9.1	1.23	.263	3.78	88	3.23	102	7.79	-7.2
10	Jose Rijo J. Rijo	2.83	1478.0	280	97	61	.614	215	1,251	17	4	0	1,301	464	523	102	453	20	22	23	6,056	17	7.62	2.76	2.76	0.62	20.7	7.5	1.19	.283	3.18	73	3.05	77	7.92	149.2
11	Bucky Walters B. Walters	2.93	2355.2	312	160	107	.599	296	879	195	32	4	2,142	766	905	112	806	32	11		9,796	45	3.36	3.08	1.09	0.43	9.0	8.2	1.25	.255	3.46	82	3.58	98	8.18	12
12	Gary Nolan G. Nolan	3.02	1656.1	245	110	67	.621	242	1,035	45	14	0	1,474	555	604	141	411	14	1	46	6,747	26	5.62	2.23	2.52	0.77	15.3	6.1	1.14	.259	3.28	85	3.16	91	8.01	51.9
13	George Suggs G. Suggs	3.03	1028.2	149	62	56	.525	117	359	74	10	8	1,046	346	448	21	218	42	29		4,174	16	3.14	1.91	1.65	0.18	8.6	5.2	1.23	.290	3.92	93	2.96	90	9.15	35.5
14	Jesse Duryea J. Duryea	3.03	820.0	105	51	45	.531	97	335	80	4	1	798	276	460	27	238	34	8		3,506	51	3.68	2.61	1.41	0.30	9.6	6.8	1.26	.268	5.05	84	3.49	93	8.76	25.8
15	Don Gullett D. Gullett	3.03	1187.0	236	91	44	.674	156	777	35	13	11	1,022	400	442	98	412	10	35	40	4,902	31	5.89	3.12	1.89	0.74	15.9	8.4	1.21	.256	3.35	87	3.37	97	7.75	12.2
16	Dolf Luque D. Luque	3.09	2668.2	395	154	152	.503	321	970	183	24	11	2,619	917	1,138	78	756	24	54		11,099	39	3.27	2.55	1.28	0.26	8.7	6.8	1.26	.274	3.84	84	3.48	94	8.83	67.8
17	Tony Mullane T. Mullane	3.15	2599.0	316	163	124	.568	285	993	264	15	9	2,391	911	1,442	73	926	121	32		11,154	184	3.44	3.21	1.07	0.25	8.9	8.3	1.28	.257	4.99	88	3.70	102	8.28	-22.6
18	Jim Maloney J. Maloney	3.16	1818.2	289	134	81	.623	258	1,592	74	30	4	1,483	638	711	135	786	35	13	37	7,598	121	7.88	3.89	2.03	0.67	21.0	10.3	1.25	.267	3.52	86	3.09	87	7.34	91.3
19	Tom Seaver T. Seaver	3.18	1085.2	158	75	46	.620	158	731	42	12	0	921	384	427	102	357	7	0	35	4,448	26	6.06	2.96	2.05	0.85	16.4	8.0	1.18	.252	3.54	87	3.55	97	7.63	14.9
20	Elmer Riddle E. Riddle	3.20	757.2	146	52	34	.605	85	255	44	10	6	709	269	310	30	332	12	36		3,237	5	3.03	3.94	0.77	0.36	7.9	10.3	1.37	.260	3.68	93	3.72	107	8.42	-24.1
21	Johnny Cueto J. Cueto	3.21	1339.0	213	92	63	.594	213	1,115	11	5	0	1,167	477	525	135	393	81	0	15	5,527	23	7.49	2.64	2.84	0.91	20.2	7.1	1.17	.271	3.53	79	3.80	93	7.84	40.8
22	Billy Rhines B. Rhines	3.28	1548.0	203	96	79	.549	179	499	153	11	1	1,564	564	880	19	483	88	24		6,680	55	2.90	2.81	1.03	0.11	7.5	7.2	1.32	.276	5.12	82	3.65	89	9.09	80.4
23	Rube Benton R. Benton	3.28	1504.2	265	84	91	.480	186	614	85	11	11	1,523	549	738	27	501	66	50		6,410	45	3.67	3.00	1.23	0.16	9.6	7.8	1.35	.288	4.41	99	3.29	97	9.11	21.6
24	Elmer Smith E. Smith	3.31	1072.1	131	69	50	.580	123	474	110	8	0	1,021	394	618	18	363		7		4,616	80	3.98	3.05	1.31	0.15	10.3	7.9	1.29	.269	5.19	88	3.44	94	8.57	31
25	Ewell Blackwell E. Blackwell	3.32	1281.1	221	79	77	.506	163	819	69	15	8	1,118	472	547	64	532	42	42		5,398	28	5.75	3.74	1.54	0.45	15.2	9.9	1.29	.267	3.84	85	3.22	82	7.85	104.3