Zack Greinke ERA in 2023

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5.062023 Regular Season

Zack Greinke posted a 5.06 ERA in the 2023 regular season.

• 19th-best of Zack Greinke's 20 seasons on file; the best is 1.66 in 2015.
• Up 1.38 from 3.68 in 2022.

Figures come from ESPN's box scores and were last read on September 21, 2026.

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Zack Greinke ERA in 2023, 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.
2004	KC	24	8	11	3.97	145.0	100	26	1.17	0
2005	KC	33	5	17	5.80	183.0	114	53	1.56	0
2006	KC	3	1	0	4.26	6.1	5	3	1.58	0
2007	KC	52	7	7	3.69	122.0	106	36	1.30	1
2008	KC	32	13	10	3.47	202.1	183	56	1.28	0
2009	KC	33	16	8	2.16	229.1	242	51	1.07	0
2010	KC	33	10	14	4.17	220.0	181	55	1.25	0
2011	MIL	28	16	6	3.83	171.2	201	45	1.20	0
2012	MIL/LAA	34	15	5	3.48	212.1	200	54	1.20	0
2013	LAD	28	15	4	2.63	177.2	148	46	1.11	0
2014	LAD	32	17	8	2.71	202.1	207	43	1.15	0
2015	LAD	32	19	3	1.66	222.2	200	40	0.84	0
2016	ARI	26	13	7	4.37	158.2	134	41	1.27	0
2017	ARI	32	17	7	3.20	202.1	215	45	1.07	0
2018	ARI	33	15	11	3.21	207.2	199	43	1.08	0
2019	ARI/HOU	33	18	5	2.93	208.2	187	30	0.98	0
2020	HOU	12	3	3	4.03	67.0	67	9	1.13	0
2021	HOU	30	11	6	4.16	171.0	120	36	1.17	0
2022	KC	26	4	9	3.68	137.0	73	27	1.34	0
2023	KC	30	2	15	5.06	142.1	97	23	1.27	0

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