Jack Powell career ERA

• Best season on file: 1.77 in 1906.
• Most recent: 3.10 in 1912.

Average of 16 regular seasons, 1897 through 1912. Figures come from ESPN's box scores and were last read on September 22, 2026.

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Jack Powell career ERA, season by season

Season↓	Team↓	GP↓iGP: Games the player appeared in, however briefly.	W↓iW: Games in which this pitcher was credited with the win.	L↓iL: Games in which this pitcher was charged with the loss.	ERA↓iERA: Earned runs allowed per nine innings pitched — lower is better. Under 3.00 is excellent.	IP↓iIP: Innings pitched. The decimal counts outs, so 6.2 is six innings and two more outs.	K↓iK: Batters this pitcher struck out.	BB↓iBB: Times the batter reached first base on four balls.	WHIP↓iWHIP: Walks and hits allowed per inning pitched — lower is better. Around 1.00 is elite.	SV↓iSV: Games finished by protecting a narrow lead to the last out.
1897	—	27	15	10	3.16	225.0	61	62	1.36	0
1898	—	42	23	15	3.00	342.0	93	112	1.29	0
1899	STL	48	23	19	3.52	373.0	87	85	1.39	0
1900	STL	38	17	16	4.44	287.2	77	77	1.40	0
1901	STL	45	19	19	3.54	338.1	133	50	1.19	3
1902	BAL	42	22	17	3.21	328.1	137	93	1.26	2
1903	BAL	38	15	19	2.91	306.1	169	58	1.15	2
1904	NYY	47	23	19	2.44	390.1	202	92	1.11	0
1905	NYY/BAL	40	10	14	3.27	231.0	96	62	1.29	1
1906	BAL	28	13	14	1.77	244.0	132	55	1.03	1
1907	BAL	32	13	16	2.68	255.2	96	62	1.14	1
1908	BAL	33	16	13	2.11	256.0	85	47	1.00	1
1909	BAL	34	12	16	2.11	239.0	82	42	1.10	3
1910	BAL	21	7	11	2.30	129.1	52	28	1.15	0
1911	BAL	31	8	19	3.29	207.2	52	44	1.29	1
1912	BAL	32	9	17	3.10	235.1	67	52	1.27	0

What the columns mean: W · L · ERA · IP · K · BB · WHIP · SV