All-Time MLB Player Pitching Stat Leaders by Season

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PLAYER	YEAR	TEAM	W	L	ERA	G	GS	CG	SHO	SV	SVO	IP	H	R	ER	HR	HB	BB	SO	WHIP	AVG
1 JohnJ ColemanColeman RF 1 ‌ ‌ ‌	1883	PHI	12	48	4.87	65	61	59	3	0	--	538.1	772	510	291	17		48	159	1.52	--
2 WillW WhiteWhite P 2 ‌ ‌ ‌	1879	CIN	43	31	1.99	76	75	75	4	0	--	680.0	676	404	150	10		68	232	1.09	--
3 BobbyB MathewsMathews P 3 ‌ ‌ ‌	1876	NYM	21	34	2.86	56	56	55	2	0	--	516.0	693	395	164	8		24	37	1.39	--
4 PhenomenalP SmithSmith P 4 ‌ ‌ ‌	1887	BAL	25	30	3.79	58	55	54	1	0	--	491.1	526	369	207	7	14	176	206	1.43	.261
5 PudP GalvinGalvin P 5 ‌ ‌ ‌	1883	BUF	46	29	2.72	76	75	72	5	0	--	656.1	676	367	198	9		50	279	1.11	--
6 GeorgeG BradleyBradley P 6 ‌ ‌ ‌	1879	TRO	13	40	2.85	54	54	53	3	0	--	487.0	590	361	154	12		26	133	1.26	--
7 AlA MaysMays P 7 ‌ ‌ ‌	1887	NYM	17	34	4.73	52	52	50	0	0	--	441.1	551	359	232	11	20	136	124	1.56	.298
8 MarkM BaldwinBaldwin P 8 ‌ ‌ ‌	1889	COL	27	34	3.61	63	59	54	6	1	--	513.2	458	358	206	9	20	274	368	1.43	.231
8 KidK CarseyCarsey P 8 ‌ ‌ ‌	1891	WAS	14	37	4.99	54	53	46	1	0	--	415.0	513	358	230	17	28	161	174	1.62	.293
8 ToadT RamseyRamsey P 8 ‌ ‌ ‌	1887	LOU	37	27	3.43	65	64	61	0	0	--	561.0	544	358	214	9	16	167	355	1.27	.242
11 HenryH GruberGruber P 11 ‌ ‌ ‌	1890	CLI	22	23	4.27	48	44	39	1	0	--	383.1	464	352	182	15	15	204	110	1.74	.286
12 BillyB CrowellCrowell P 12 ‌ ‌ ‌	1887	CLE	14	31	4.88	45	45	45	1	0	--	389.1	541	350	211	9	20	138	72	1.74	.327
12 MattM KilroyKilroy P 12 ‌ ‌ ‌	1886	BAL	29	34	3.37	68	68	66	5	0	--	583.0	476	350	218	10	19	182	513	1.13	.210
12 LarryL McKeonMcKeon P 12 ‌ ‌ ‌	1884	IND	18	41	3.50	61	60	59	2	0	--	512.0	488	350	199	20	18	94	308	1.14	.235
15 FrankF MountainMountain P 15 ‌ ‌ ‌	1883	COL	26	33	3.60	59	59	57	4	0	--	503.0	546	345	201	8		123	159	1.33	--
16 LeeL RichmondRichmond P 16 ‌ ‌ ‌	1882	WOR	14	33	3.74	48	46	44	0	0	--	411.0	525	343	171	11		88	123	1.49	--
17 GusG WeyhingWeyhing P 17 ‌ ‌ ‌	1887	PHA	26	28	4.27	55	55	53	2	0	--	466.1	465	342	221	12	37	167	193	1.36	.253
18 MikeM MorrisonMorrison P 18 ‌ ‌ ‌	1887	CLE	12	25	4.92	40	40	35	0	0	--	316.2	385	341	173	13	22	205	158	1.86	.294
19 HardieH HendersonHenderson P 19 ‌ ‌ ‌	1883	BAL	10	33	4.39	46	43	39	0	0	--	367.1	409	339	179	4		89	147	1.36	--
20 JerseyJ BakleyBakley P 20 ‌ ‌ ‌	1884	PHK	16	30	4.29	46	45	43	1	0	--	394.2	443	338	188	0		81	226	1.33	--
21 HenryH PorterPorter P 21 ‌ ‌ ‌	1888	KC	18	37	4.16	55	54	53	4	0	--	474.0	527	336	219	16	23	120	145	1.36	.272
22 ParkP SwartzelSwartzel P 22 ‌ ‌ ‌	1889	KC	19	27	4.32	48	47	45	0	1	--	410.1	481	334	197	21	23	117	147	1.46	.283
23 GeorgeG CobbCobb P 23 ‌ ‌ ‌	1892	BAL	10	37	4.86	53	47	42	0	0	--	394.1	495	333	213	21	19	140	159	1.61	.295
24 FleuryF SullivanSullivan P 24 ‌ ‌ ‌	1884	PIT	16	35	4.20	51	51	51	2	0	--	441.0	496	328	206	15	20	96	189	1.34	.268
25 BobB BarrBarr P 25 ‌ ‌ ‌	1884	IND	12	34	3.94	48	48	47	2	0	--	413.0	471	327	181	11	18	50	207	1.26	.264

Data validation provided by Elias Sports Bureau, the Official Statistician of Major League Baseball