Jack Flaherty

2026 seasonregular season

Bats/Throws: R/R
Height: 6' 4"
Weight: 225 lb
Age: 30
Born: Burbank, CA, USA
MLB debut: 2017-09-01
Drafted: 2014

Pitch qualityour Stuff+ grades

How nasty each pitch is from its physical shape alone — velocity, spin, movement, extension and release point — on a scale where 100 is league average and every 10 points is one standard deviation. It does not see where the pitch was thrown, the count, or what happened to it, so a pitcher with great stuff and poor command can still give up runs. How it is built

100overall

Four-seam fastball101
Slider101
Knuckle curve99
Sinker93
Changeup89

Pitching

Season	G	GS	IP	ERA	WHIP	K	BB	HR	K/9	W-L	SV
2026	20	19	88.1	4.48	1.39	103	42	11	10.49	3-8	0

Last 10 games

Game	Dec	IP	H	ER	BB	K	HR	P
09/27vPITL		2.0	1	0	0	1	0	19
07/20@CHCW		4.0	4	3	2	4	2	82
07/10vPHIW	W	6.0	2	2	3	6	1	86
07/04@TEXW	W	5.2	3	0	0	5	0	88
06/28vHOUL		5.0	2	0	3	9	0	94
06/12@CLEL	L	3.0	3	2	1	1	0	63
06/07vSEAW		5.0	6	3	1	7	0	87
06/02@TBW	W	5.0	5	0	2	6	0	94
05/28vLAAL	L	5.2	6	3	1	9	0	91
05/22@BALL	L	3.1	8	3	0	7	2	78

Full 2026 game log (20 games)

Game	Dec	IP	H	ER	BB	K	HR	P
09/27vPITL		2.0	1	0	0	1	0	19
07/20@CHCW		4.0	4	3	2	4	2	82
07/10vPHIW	W	6.0	2	2	3	6	1	86
07/04@TEXW	W	5.2	3	0	0	5	0	88
06/28vHOUL		5.0	2	0	3	9	0	94
06/12@CLEL	L	3.0	3	2	1	1	0	63
06/07vSEAW		5.0	6	3	1	7	0	87
06/02@TBW	W	5.0	5	0	2	6	0	94
05/28vLAAL	L	5.2	6	3	1	9	0	91
05/22@BALL	L	3.1	8	3	0	7	2	78
05/17vTORL	L	6.0	5	4	0	4	1	90
05/12@NYML	L	3.2	6	3	3	2	0	97
05/06vBOSL	L	5.0	3	2	1	10	0	96
05/01vTEXL		3.2	5	4	3	4	1	91
04/25@CINL	L	2.0	5	6	2	4	3	68
04/20@BOSL		3.1	3	0	6	3	0	73
04/15vKCW		6.0	2	1	3	7	0	97
04/09@MINL		5.2	5	1	3	6	1	89
04/04vSTLW		4.0	3	5	4	6	0	86
03/28@SDL	L	4.1	4	2	4	2	0	89

Career by season

Season	G	GS	IP	ERA	WHIP	K	BB	HR	K/9	W-L
2017STL	6	5	21.1	6.33	1.55	20	10	4	8.44	0-2
2018STL	28	28	151.0	3.34	1.11	182	59	20	10.85	8-9
2019STL	33	33	196.1	2.75	0.97	231	55	25	10.59	11-8
2020STL	9	9	40.1	4.91	1.21	49	16	6	10.93	4-3
2021STL	17	15	78.1	3.22	1.06	85	26	12	9.77	9-2
2022STL	9	8	36.0	4.25	1.61	33	22	4	8.25	2-1
2023STL	20	20	109.2	4.43	1.55	106	54	10	8.70	7-6
2023BAL	9	7	34.2	6.75	1.67	42	12	7	10.90	1-3
20232 teams	29	27	144.1	4.99	1.58	148	66	17	9.23	8-9
2024DET	18	18	106.2	2.95	0.96	133	19	15	11.22	7-5
2024LAD	10	10	55.1	3.58	1.28	61	19	9	9.92	6-2
20242 teams	28	28	162.0	3.17	1.07	194	38	24	10.78	13-7
2025DET	31	31	161.0	4.64	1.28	188	59	23	10.51	8-15
2026DET	20	19	88.1	4.48	1.39	103	42	11	10.49	3-8

Stats from the MLB Stats API, regular season only. A traded player's combined season appears as one row per club plus the total.