Jack Flaherty ERA in 2026

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4.592026 Regular Season

Jack Flaherty has a 4.59 ERA in the 2026 regular season, as of Sep 22, 2026.

• 6th-best of Jack Flaherty's 10 seasons on file; the best is 2.75 in 2019.
• Down 0.05 from 4.64 in 2025.

Average of 10 regular seasons, 2017 through 2026. Figures come from ESPN's box scores and were last read on September 22, 2026.

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Jack Flaherty ERA in 2026, 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.
2017	STL	6	0	2	6.33	21.1	20	10	1.55	0
2018	STL	28	8	9	3.34	151.0	182	59	1.11	0
2019	STL	39	11	8	2.75	196.1	231	55	0.97	0
2020	STL	9	4	3	4.91	40.1	49	16	1.21	0
2021	STL	17	9	2	3.22	78.1	85	26	1.06	0
2022	STL	9	2	1	4.25	36.0	33	22	1.61	0
2023	STL/BAL	29	8	9	4.99	144.1	148	66	1.58	0
2024	DET/LAD	28	13	7	3.17	162.0	194	38	1.07	0
2025	DET	31	8	15	4.64	161.0	188	59	1.28	0
2026	DET	19	3	8	4.59	86.1	102	42	1.41	0

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