starting pitcher with the highest innings pitched per earned runs in mlb history

Juan Pena and John Gaddy are tied for the most career innings pitched per earned run by a starting pitcher, with 13.

	NAME	IP/ER	IP	ER	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	H	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	H/9
1	Juan Pena J. Pena	13	13.0	1	2	2	0	1.000	2	0.69	15	0	0	0	9	1	0	3	0	0	0	49	0	10.38	2.08	5.00	0.00	30.6	6.1	0.92	.290	0.69	6.23
2	John Gaddy J. Gaddy	13	13.0	1	2	2	0	1.000	2	0.69	3	1	0	0	13	3	0	4	1	0		57	0	2.08	2.77	0.75	0.00	5.3	7.0	1.31	.265	2.08	9.00
3	Marty McLeary M. McLeary	12	12.0	1	2	1	0	1.000	2	0.75	4	0	0	0	9	1	1	4	0	0	0	47	0	3.00	3.00	1.00	0.75	8.5	8.5	1.08	.211	0.75	6.75
4	Tim Burke T. Burke	12	12.0	1	2	1	0	1.000	2	0.75	11	0	0	0	12	1	0	1	0	0	1	47	0	8.25	0.75	11.00	0.00	23.4	2.1	1.08	.343	0.75	9.00
5	Minnie Rojas M. Rojas	11.67	11.2	1	2	2	0	1.000	2	0.77	6	0	0	0	12	1	1	1	1	0	0	48	0	4.63	0.77	6.00	0.77	12.5	2.1	1.11	.282	0.77	9.26
6	Mick Abel M. Abel	11.33	11.1	1	2	1	0	1.000	2	0.79	11	0	0	0	8	1	0	0	0	0	0	41	1	8.74	0.00		0.00	26.8	0.0	0.71	.267	0.79	6.35
7	Erik Miller E. Miller	10.67	10.2	1	10	0	0		10	0.84	11	0	0	0	7	2	1	6	0	0	0	41	0	9.28	5.06	1.83	0.84	26.8	14.6	1.22	.261	1.69	5.91
8	Noah Cameron N. Cameron	10.56	31.2	3	5	2	1	.667	5	0.85	19	0	0	0	15	3	2	10	0	0	0	119	0	5.40	2.84	1.90	0.57	16.0	8.4	0.79	.148	0.85	4.26
9	Grover Powell G. Powell	10.5	21.0	2	4	1	1	.500	4	0.86	10	1	1	0	13	6	0	13	0	0	0	89	2	4.29	5.57	0.77	0.00	11.2	14.6	1.24	.197	2.57	5.57
10	Dave Jolly D. Jolly	10	10.0	1	1	0	0		1	0.90	3	0	0	0	4	1	0	6	0	0	1	36	0	2.70	5.40	0.50	0.00	8.3	16.7	1.00	.148	0.90	3.60
11	Chad Zerbe C. Zerbe	9.67	9.2	1	2	1	0	1.000	2	0.93	3	0	0	0	8	3	0	5	0	0	0	42	0	2.79	4.66	0.60	0.00	7.1	11.9	1.34	.235	2.79	7.45
12	Bob Humphreys B. Humphreys	9.5	19.0	2	4	3	1	.750	4	0.95	11	0	0	0	17	3	0	8	0	0	0	80	0	5.21	3.79	1.38	0.00	13.8	10.0	1.32	.279	1.42	8.05
13	Eddie O'Brien E. O'Brien	9	9.0	1	1	1	0	1.000	1	1.00	8	1	0	0	6	1	0	3	0	0	0	36	0	8.00	3.00	2.67	0.00	22.2	8.3	1.00	.240	1.00	6.00
14	Ray Martin R. Martin	9	9.0	1	1	1	0	1.000	1	1.00	2	1	0	0	7	1	0	4	0	0		37	0	2.00	4.00	0.50	0.00	5.4	10.8	1.22	.226	1.00	7.00
15	Len Perme L. Perme	9	9.0	1	1	0	1	.000	1	1.00	2	1	0	0	4	1	0	2	0	0		33	0	2.00	2.00	1.00	0.00	6.1	6.1	0.67	.138	1.00	4.00
16	Rodrigo Rosario R. Rosario	8	8.0	1	2	1	0	1.000	2	1.13	6	0	0	0	5	2	0	3	1	0	1	33	1	6.75	3.38	2.00	0.00	18.2	9.1	1.00	.217	2.25	5.63
17	Shawn Armstrong S. Armstrong	7.92	31.2	4	16	0	2	.000	16	1.14	36	0	0	0	26	6	1	7	0	0	0	124	0	10.23	1.99	5.14	0.28	29.0	5.6	1.04	.313	1.71	7.39
18	Rhett Lowder R. Lowder	7.67	30.2	4	6	2	2	.500	6	1.17	22	0	0	0	25	4	0	14	0	0	0	128	0	6.46	4.11	1.57	0.00	17.2	10.9	1.27	.272	1.17	7.34
19	Travis Lakins T. Lakins	7.33	7.1	1	4	0	0		4	1.23	6	0	0	0	3	1	0	5	1	0	0	31	1	7.36	6.14	1.20	0.00	19.4	16.1	1.09	.158	1.23	3.68
20	Dennis Musgraves D. Musgraves	7	7.0	1	1	0	0		1	1.29	3	0	0	0	7	1	0	1	0	0	0	28	1	3.86	1.29	3.00	0.00	10.7	3.6	1.14	.292	1.29	9.00
21	Whitey Wistert W. Wistert	7	7.0	1	1	0	1	.000	1	1.29	1	0	0	0	5	1	1	5	0	0		30	0	1.29	6.43	0.20	1.29	3.3	16.7	1.43	.174	1.29	6.43
22	River Ryan R. Ryan	6.78	20.1	3	4	1	0	1.000	4	1.33	18	0	0	0	15	4	1	9	0	0	0	81	0	7.97	3.98	2.00	0.44	22.2	11.1	1.18	.264	1.77	6.64
23	Dick Baney D. Baney	6.78	20.1	3	3	2	0	1.000	3	1.33	7	0	0	0	21	3	2	5	1	0	1	83	0	3.10	2.21	1.40	0.89	8.4	6.0	1.28	.279	1.33	9.30
24	Brennan Bernardino B. Bernardino	6.33	12.2	2	9	0	0		9	1.42	19	0	0	0	8	3	0	4	4	0	0	52	0	13.50	2.84	4.75	0.00	36.5	7.7	0.95	.320	2.13	5.68
25	Trevor Kelley T. Kelley	6.33	6.1	1	3	0	0		3	1.42	4	0	0	0	4	1	1	0	1	0	0	24	1	5.68	0.00		1.42	16.7	0.0	0.63	.167	1.42	5.68