Jack Aker ERA in 1971

• 3rd-best of Jack Aker's 11 seasons on file; the best is 1.99 in 1966.
• Up 0.53 from 2.06 in 1970.

Figures come from ESPN's box scores and were last read on September 22, 2026.

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Jack Aker ERA in 1971, 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.
1964	ATH	9	0	1	8.82	16.1	7	10	1.65	0
1965	ATH	34	4	3	3.16	51.1	26	18	1.23	3
1966	ATH	66	8	4	1.99	113.0	68	28	0.96	32
1967	ATH	57	3	8	4.30	88.0	65	32	1.35	12
1968	ATH	54	4	4	4.10	74.2	44	33	1.41	11
1969	MIL/NYY	53	8	6	3.17	82.1	47	35	1.35	14
1970	NYY	41	4	2	2.06	70.0	36	20	1.10	16
1971	NYY	41	4	4	2.59	55.2	24	26	1.33	4
1972	NYY/CHC	52	6	6	2.96	73.0	37	26	1.32	17
1973	CHC	47	4	5	4.10	63.2	25	23	1.55	12
1974	ATL/NYM	41	2	2	3.57	58.0	25	23	1.26	2

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