Christy Mathewson has the best career ERA for the New York Giants, with an ERA of 2.12.

Interpreted as:

best with a minimum of 750 IP pitcher sf giants

	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	Christy Mathewson C. Mathewson	2.12	4779.2	635	372	188	.664	551	2,504	434	79	30	4,204	1,127	1,612	88	847	59	73		18,870	114	4.71	1.59	2.96	0.17	13.3	4.5	1.06	.268	3.04	74	2.26	76	7.92	363.8
2	Joe McGinnity J. McGinnity	2.38	2151.1	300	151	88	.632	237	787	186	26	21	1,937	568	774	34	464	84	53		8,666	16	3.29	1.94	1.70	0.14	9.1	5.4	1.12	.261	3.24	86	2.69	94	8.10	43.8
3	Jeff Tesreau J. Tesreau	2.43	1679.0	247	119	72	.623	207	880	123	27	9	1,350	453	591	37	572	38	25		6,805	42	4.72	3.07	1.54	0.20	12.9	8.4	1.14	.249	3.17	89	2.79	99	7.24	2.5
4	Red Ames R. Ames	2.45	1802.2	282	108	77	.584	212	1,169	128	15	12	1,542	490	726	17	620	39	48		7,276	107	5.84	3.10	1.89	0.08	16.1	8.5	1.20	.281	3.62	86	2.35	81	7.70	115.5
5	Hooks Wiltse H. Wiltse	2.48	2053.0	339	136	85	.615	222	948	151	27	28	1,843	565	765	53	491	38	100		8,187	40	4.16	2.15	1.93	0.23	11.6	6.0	1.14	.269	3.35	89	2.56	90	8.08	67.4
6	Tim Keefe T. Keefe	2.54	2265.0	272	174	82	.680	269	1,303	252	22	1	1,913	639	1,076	41	580	45	4		9,282	147	5.18	2.30	2.25	0.16	14.0	6.2	1.10	.256	4.28	75	2.88	84	7.60	126.5
7	Pol Perritt P. Perritt	2.58	964.2	169	68	50	.576	119	348	66	20	6	920	277	350	25	216	29	37		3,962	11	3.25	2.02	1.61	0.23	8.8	5.5	1.18	.268	3.27	98	2.70	104	8.58	-15.6
8	Mickey Welch M. Welch	2.69	3579.0	427	238	146	.620	412	1,570	391	28	4	3,308	1,068	1,828	85	1,077	52	15		15,131	222	3.95	2.71	1.46	0.21	10.4	7.1	1.23	.261	4.60	83	3.40	101	8.32	-25.8
9	Dummy Taylor D. Taylor	2.77	1882.1	270	115	103	.528	233	759	156	20	3	1,840	579	853	38	543	70	30		7,809	47	3.63	2.60	1.40	0.18	9.7	7.0	1.27	.282	4.08	95	2.99	101	8.80	-6.8
10	Rube Benton R. Benton	2.79	1012.2	172	66	53	.555	125	336	60	12	10	949	314	377	25	211	29	32		4,129	21	2.99	1.88	1.59	0.22	8.1	5.1	1.15	.262	3.35	101	2.85	101	8.43	-7.4
11	Fred Toney F. Toney	2.81	880.1	132	63	36	.636	110	213	60	10	6	843	275	323	34	195	16	20		3,569	13	2.18	1.99	1.09	0.35	6.0	5.5	1.18	.260	3.30	84	3.51	104	8.62	-19.2
12	Gary Lavelle G. Lavelle	2.82	980.1	647	73	67	.521	3	696	0	0	127	910	307	359	44	382	13	369	117	4,149	18	6.39	3.51	1.82	0.40	16.8	9.2	1.32	.287	3.30	79	3.05	87	8.35	51.2
13	Juan Marichal J. Marichal	2.84	3443.2	458	238	140	.630	446	2,281	244	52	2	3,081	1,086	1,288	315	690	38	10	80	13,958	51	5.96	1.80	3.31	0.82	16.3	4.9	1.10	.260	3.37	80	3.02	88	8.05	155.7
14	Rube Marquard R. Marquard	2.85	1546.0	239	103	76	.575	189	897	99	16	12	1,420	489	633	49	430	27	32		6,285	49	5.22	2.50	2.09	0.29	14.3	6.8	1.20	.281	3.68	97	2.70	88	8.27	62.4
15	Amos Rusie A. Rusie	2.89	3531.2	427	234	163	.589	403	1,835	372	29	5	3,100	1,134	1,862	62	1,588	103	24		15,168	142	4.68	4.05	1.16	0.16	12.1	10.5	1.33	.262	4.75	74	3.67	91	7.90	126.9
16	Doc Crandall D. Crandall	2.89	1002.2	217	67	36	.650	77	401	48	4	24	991	322	439	38	245	25	128		4,138	6	3.60	2.20	1.64	0.34	9.7	5.9	1.23	.278	3.94	100	2.96	99	8.90	4.3
17	Jesse Barnes J. Barnes	2.92	1150.1	181	82	43	.656	141	287	81	11	9	1,169	373	462	41	199	10	28		4,730	9	2.25	1.56	1.44	0.32	6.1	4.2	1.19	.269	3.61	87	3.30	97	9.15	9.2
18	Gaylord Perry G. Perry	2.96	2294.1	367	134	109	.551	283	1,606	125	21	9	2,061	755	892	165	581	50	30	89	9,417	81	6.30	2.28	2.76	0.65	17.1	6.2	1.15	.270	3.50	85	2.88	86	8.08	124.4
19	Carl Hubbell C. Hubbell	2.98	3590.1	535	253	154	.622	433	1,677	260	36	33	3,461	1,188	1,380	227	725	53	82		14,805	53	4.20	1.82	2.31	0.57	11.3	4.9	1.17	.267	3.46	76	3.55	89	8.68	174.2
20	Johnny Antonelli J. Antonelli	3.13	1600.2	280	108	84	.563	219	919	86	21	19	1,437	556	633	152	528	30	39	45	6,677	20	5.17	2.97	1.74	0.85	13.8	7.9	1.23	.255	3.56	81	3.57	92	8.08	54.2
21	Sal Maglie S. Maglie	3.13	1297.2	221	95	42	.693	171	654	77	20	8	1,216	451	512	117	434	31	23	2	5,432	15	4.54	3.01	1.51	0.81	12.0	8.0	1.27	.262	3.55	78	3.71	92	8.43	46.2
22	Madison Bumgarner M. Bumgarner	3.13	1846.0	289	119	92	.564	286	1,794	15	6	0	1,622	642	703	192	428	62	1	34	7,507	25	8.75	2.09	4.19	0.94	23.9	5.7	1.11	.284	3.43	83	3.32	87	7.91	97.4
23	Stu Miller S. Miller	3.16	804.1	307	47	44	.516	45	506	8	1	47	736	282	324	67	261	16	157	45	3,359	12	5.66	2.92	1.94	0.75	15.1	7.8	1.24	.267	3.63	82	3.38	90	8.24	34.5
24	Greg Minton G. Minton	3.23	870.1	552	45	52	.464	7	352	0	0	125	857	312	361	33	376	9	335	112	3,732	47	3.64	3.89	0.94	0.34	9.4	10.1	1.42	.278	3.73	91	3.72	105	8.86	-16.8
25	Bobby Bolin B. Bolin	3.26	1282.1	345	73	56	.566	144	977	29	10	22	1,088	465	542	129	477	53	87	55	5,400	47	6.86	3.35	2.05	0.91	18.1	8.8	1.22	.255	3.80	94	3.55	106	7.64	-29.7