Jim Whitney has the highest wRC+ by a pitcher in a season, with 162 wRC+ in 1882.

Interpreted as:

top single season wrc+ with a minimum of 3.1 PA per team game by a pitcher

	NAME	WRC+	SEASON	TM	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	PA	TB	XBH	AVG	OBP	SLG	OPS	WRC	WRAA	WOBA	BRAA
1	Jim Whitney J. Whitney	162	1882	BOS	61	251	49	81	18	7	5	48	24		13	275	128	30	.323		.510		65	26	.399	25.3
2	Charlie Sweeney C. Sweeney	136	1884	TOT	86	339	55	104	23	2	2	19	21		17	360	137	27	.307		.404		71	18.4	.345	19
3	Tony Mullane T. Mullane	122	1884	TOL	95	352	49	97	19	3	3		33	1		386	131	25	.276	.339	.372	.712	72	15.3	.330	12.7
4	Jim Whitney J. Whitney	121	1883	BSN	96	409	78	115	27	10	5	57	25		29	434	177	42	.281		.433		83	18	.337	14.8
5	Curry Foley C. Foley	121	1880	BOS	80	332	44	97	13	2	2	31	8		14	340	120	17	.292		.361		53	9.4	.305	9.3
6	Terry Larkin T. Larkin	121	1878	CWS	58	226	33	65	9	4	0	32	17		17	243	82	13	.288		.363		42	9	.329	7
7	Al Spalding A. Spalding	119	1876	CWS	66	292	54	91	14	2	0	44	6		3	298	109	16	.312		.373		55	10.8	.324	8.4
8	John Ward J. Ward	112	1879	PRO	83	364	71	104	9	4	2	41	7		14	371	127	15	.286		.349		58	6.4	.293	6.4
9	Jim Devlin J. Devlin	109	1876	LOU	68	298	38	94	14	1	0	28	1		11	299	110	15	.315		.369		54	9.3	.318	4.2
10	Old Hoss Radbourn O. Hoss Radbourn	104	1883	PRO	89	381	59	108	11	3	3	48	14		16	395	134	17	.283		.352		64	4.8	.301	2.5
11	Guy Hecker G. Hecker	104	1883	LOU	81	332	59	90	6	6	1		12			344	111	13	.271		.334		52	0.4	.288	2
12	Charlie Buffinton C. Buffinton	103	1884	BSN	87	352	48	94	18	3	1	39	16		12	368	121	22	.267		.344		58	4.8	.296	1.8
13	Tony Mullane T. Mullane	103	1882	LOU	77	303	46	78	13	1	0		13			316	93	14	.257		.307		44	-0.4	.274	1.3
14	Jim Whitney J. Whitney	101	1881	BOS	75	282	37	72	17	3	0	32	19		18	301	95	20	.255		.337		42	1.7	.297	0.6
15	George Bradley G. Bradley	101	1876	STL	64	265	29	66	7	6	0	28	3		12	268	85	13	.249		.321		38	-2.4	.266	0.2
16	Jim McCormick J. McCormick	91	1880	CLE	78	289	34	71	11	0	0	26	5		5	294	82	11	.246		.284		33	-4.1	.248	-3.5
17	Pud Galvin P. Galvin	91	1879	BUF	67	265	34	66	11	6	0	27	1		56	266	89	17	.249		.336		35	-1.7	.262	-3.6
18	George Bradley G. Bradley	90	1879	TRO	63	251	36	62	9	5	0	23	1		20	252	81	14	.247		.323		32	-2.8	.256	-3.5
19	Old Hoss Radbourn O. Hoss Radbourn	87	1882	PRO	83	326	30	78	11	0	1	32	12		22	338	92	12	.239		.282		42	-5.9	.253	-6.3
20	Jim McCormick J. McCormick	87	1881	CLE	70	309	45	79	9	4	0	26	5		16	314	96	13	.256		.311		37	-5.8	.266	-5.6
21	Old Hoss Radbourn O. Hoss Radbourn	87	1884	PRO	87	361	48	83	7	1	1	37	26		42	387	95	9	.230		.263		50	-6	.259	-8
22	Terry Larkin T. Larkin	86	1877	HAR	58	228	28	52	6	5	1	18	5		23	233	71	12	.228		.311		28	-6.3	.254	-4.8
23	Lon Knight L. Knight	85	1876	PHI	55	240	32	60	9	3	0	24	2		2	242	75	12	.250		.313		33	-2.9	.262	-5.5
24	Jim Devlin J. Devlin	85	1877	LOU	61	268	38	72	6	3	1	27	7		27	275	87	10	.269		.325		39	-1.2	.283	-6.3
25	John Coleman J. Coleman	83	1883	PHN	90	354	33	83	12	8	0	32	15		39	369	111	20	.234		.314		49	-6.7	.263	-10