Don Rudolph had the highest ERA in 1963, with an ERA of 4.55.

Interpreted as:

worst era with a minimum of 1 IP per team game pitcher in MLB in 1963

	NAME	ERA	SEASON	TM	G	W	L	W%	GS	SO	CG	SHO	SV	IP	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	Don Rudolph D. Rudolph	4.55	1963	WSH	37	7	19	.269	26	70	4	0	1	174.0	189	88	98	28	36	6	4	3	745	2	3.62	1.86	1.94	1.45	9.4	4.8	1.29	.266	5.07	125	4.49	123	9.78	-16.3
2	Bennie Daniels B. Daniels	4.38	1963	WSH	35	5	10	.333	24	88	6	1	1	168.2	163	82	90	19	58	1	3	9	724	5	4.70	3.09	1.52	1.01	12.2	8.0	1.31	.258	4.80	121	3.95	108	8.70	-5.6
3	Joey Jay J. Jay	4.29	1963	CIN	30	7	18	.280	22	116	4	1	1	170.0	172	81	91	19	73	3	5	2	733	8	6.14	3.86	1.59	1.01	15.8	10.0	1.44	.293	4.82	128	3.91	117	9.11	-10.4
4	Dick Donovan D. Donovan	4.24	1963	CLE	30	11	13	.458	30	84	7	3	0	206.0	211	97	106	27	28	5	0	5	842	0	3.67	1.22	3.00	1.18	10.0	3.3	1.16	.264	4.63	118	3.85	107	9.22	-5.6
5	Jim Kaat J. Kaat	4.19	1963	MIN	31	10	10	.500	27	105	7	1	1	178.1	195	83	96	24	38	9	1	1	764	6	5.30	1.92	2.76	1.21	13.7	5.0	1.31	.291	4.84	113	3.84	103	9.84	-2.1
6	Ray Sadecki R. Sadecki	4.10	1963	STL	36	10	10	.500	28	136	4	1	1	193.1	198	88	100	25	78	4	1	3	834	12	6.33	3.63	1.74	1.16	16.3	9.4	1.43	.293	4.66	115	4.03	114	9.22	-9.1
7	Dave Wickersham D. Wickersham	4.09	1963	KCA	38	12	15	.444	34	118	4	1	1	237.2	244	108	116	21	79	9	2	2	1,020	5	4.47	2.99	1.49	0.80	11.6	7.7	1.36	.281	4.39	107	3.75	98	9.24	2.8
8	Al Jackson A. Jackson	3.96	1963	NYM	37	13	17	.433	34	142	11	0	1	227.0	237	100	128	25	84	12	1	2	1,000	9	5.63	3.33	1.69	0.99	14.2	8.4	1.41	.288	5.07	116	3.93	116	9.40	-12.3
9	Bob Hendley B. Hendley	3.93	1963	MIL	41	9	9	.500	24	105	7	3	3	169.1	153	74	80	16	64	1	8	4	708	4	5.58	3.40	1.64	0.85	14.8	9.0	1.28	.262	4.25	122	3.62	113	8.13	-8.2
10	Ed Rakow E. Rakow	3.92	1963	KCA	34	9	10	.474	26	104	7	1	0	174.1	173	76	85	18	61	5	2	4	738	8	5.37	3.15	1.70	0.93	14.1	8.3	1.34	.282	4.39	103	3.76	98	8.93	1.7
11	Glen Hobbie G. Hobbie	3.92	1963	CHC	36	7	10	.412	24	94	4	1	0	165.1	172	72	80	17	49	6	5	2	701	9	5.12	2.67	1.92	0.93	13.4	7.0	1.34	.290	4.35	115	3.68	108	9.36	-4.5
12	Jim Bunning J. Bunning	3.88	1963	DET	39	12	13	.480	35	196	6	2	1	248.1	245	107	119	38	69	5	3	3	1,051	4	7.10	2.50	2.84	1.38	18.6	6.6	1.26	.279	4.31	106	3.78	103	8.88	-2.6
13	Phil Regan P. Regan	3.86	1963	DET	38	15	9	.625	27	115	5	1	1	189.0	179	81	95	33	59	7	5	5	811	6	5.48	2.81	1.95	1.57	14.2	7.3	1.26	.245	4.52	105	4.58	124	8.52	-18.5
14	Jim Perry J. Perry	3.83	1963	TOT	40	9	9	.500	25	72	5	1	1	178.2	179	76	83	17	59	2	6	4	768	4	3.63	2.97	1.22	0.86	9.4	7.7	1.33	.262	4.18	104	3.93	106	9.02	-4
15	Bill Monbouquette B. Monbouquette	3.81	1963	BOS	37	20	10	.667	36	174	13	1	0	266.2	258	113	119	31	42	0	1	6	1,090	3	5.87	1.42	4.14	1.05	16.0	3.9	1.13	.269	4.02	100	3.16	82	8.71	19.7
16	Dave Morehead D. Morehead	3.81	1963	BOS	29	10	13	.435	29	136	6	1	0	174.2	137	74	82	20	99	0	0	2	752	2	7.01	5.10	1.37	1.03	18.1	13.2	1.35	.235	4.23	100	4.11	107	7.06	-4.7
17	Roger Craig R. Craig	3.78	1963	NYM	46	5	22	.185	31	108	14	0	2	236.0	249	99	117	28	58	6	9	2	1,014	4	4.12	2.21	1.86	1.07	10.7	5.7	1.30	.271	4.46	110	3.92	115	9.50	-12.6
18	Diego Segui D. Segui	3.77	1963	KCA	38	9	6	.600	23	116	4	1	0	167.0	173	70	84	17	73	2	4	7	739	5	6.25	3.93	1.59	0.92	15.7	9.9	1.47	.294	4.53	99	3.76	98	9.32	1.7
19	Earl Wilson E. Wilson	3.76	1963	BOS	37	11	16	.407	34	123	6	3	0	210.2	184	88	99	18	105	1	3	4	908	21	5.25	4.49	1.17	0.77	13.5	11.6	1.37	.251	4.23	99	3.93	103	7.86	-1.7
20	Lew Burdette L. Burdette	3.71	1963	TOT	36	9	13	.409	27	73	7	1	2	182.0	177	75	90	21	40	8	5	6	758	0	3.61	1.98	1.83	1.04	9.6	5.3	1.19	.253	4.45	109	3.97	119	8.75	-12.3
21	Orlando Pena O. Pena	3.69	1963	KCA	35	12	20	.375	33	128	9	3	0	217.0	218	89	93	24	53	5	2	2	914	4	5.31	2.20	2.42	1.00	14.0	5.8	1.25	.276	3.86	97	3.54	92	9.04	7.3
22	Mudcat Grant M. Grant	3.69	1963	CLE	38	13	14	.481	32	157	10	2	1	229.1	213	94	107	30	87	4	2	3	983	6	6.16	3.41	1.80	1.18	16.0	8.9	1.31	.260	4.20	103	4.00	111	8.36	-10.1
23	Hank Aguirre H. Aguirre	3.67	1963	DET	38	14	15	.483	33	134	14	3	0	225.2	222	92	96	25	68	8	2	3	954	2	5.34	2.71	1.97	1.00	14.0	7.1	1.29	.274	3.83	100	3.74	102	8.85	-1.3
24	Bob Bruce B. Bruce	3.59	1963	HOU	30	5	9	.357	25	123	1	1	0	170.1	162	68	73	7	60	8	2	3	726	9	6.50	3.17	2.05	0.37	16.9	8.3	1.30	.294	3.86	115	2.77	89	8.56	6.3
25	Johnny Podres J. Podres	3.54	1963	LAD	37	14	12	.538	34	134	10	5	1	198.1	196	78	91	16	64	3	3	13	845	5	6.08	2.90	2.09	0.73	15.9	7.6	1.31	.287	4.13	117	3.19	106	8.89	-5.3