Grant Jackson career ERA

• Best season on file: 1.90 in 1973.
• Most recent: 5.31 in 1982.

Average of 18 regular seasons, 1965 through 1982. Figures come from ESPN's box scores and were last read on September 22, 2026.

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Grant Jackson 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.
1965	PHI	6	1	1	7.24	13.2	15	5	1.61	0
1966	PHI	2	0	0	5.40	1.2	0	3	3.00	0
1967	PHI	43	2	3	3.84	84.1	83	43	1.53	1
1968	PHI	33	1	6	2.95	61.0	49	20	1.30	1
1969	PHI	38	14	18	3.34	253.0	180	92	1.30	1
1970	PHI	32	5	15	5.29	149.2	104	61	1.54	0
1971	BAL	29	4	3	3.13	77.2	51	20	1.18	0
1972	BAL	32	1	1	2.63	41.0	34	9	1.02	8
1973	BAL	45	8	0	1.90	80.1	47	24	0.97	9
1974	BAL	49	6	4	2.57	66.2	56	22	1.05	12
1975	BAL	41	4	3	3.35	48.1	39	21	1.30	7
1976	BAL/NYY	34	7	1	2.54	78.0	39	25	1.05	4
1977	PIT	49	5	3	3.86	91.0	41	39	1.32	4
1978	PIT	60	7	5	3.26	77.1	45	32	1.56	5
1979	PIT	72	8	5	2.96	82.0	39	35	1.24	14
1980	PIT	61	8	4	2.92	71.0	31	20	1.28	9
1981	WSH/PIT	45	2	2	3.77	43.0	21	19	1.47	4
1982	PIT/KC	21	3	1	5.31	39.0	15	21	1.64	0

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