Mitchell Parker has the best ERA by a left-hander this season, with an ERA of 1.39.

Interpreted as:

best left handed with a minimum of 1 IP per team game pitchers this regular season

	NAME	ERA	SEASON	TM	G	W	L	W%	GS	SO	IP	H	ER	R	HR	BB	HBP	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Mitchell Parker M. Parker	1.39	2025	WSH	5	3	1	.750	5	20	32.1	19	5	6	1	11	2	0	128	1	5.57	3.06	1.82	0.28	15.6	8.6	0.93	.191	1.67	35	3.39	86	5.29	2
2	Max Fried M. Fried	1.42	2025	NYY	5	4	0	1.000	5	30	31.2	25	5	9	2	7	3	0	132	0	8.53	1.99	4.29	0.57	22.7	5.3	1.01	.256	2.56	36	2.89	70	7.11	4.3
3	Kris Bubic K. Bubic	1.45	2025	KCR	5	2	1	.667	5	33	31.0	24	5	7	1	9	2	1	127	0	9.58	2.61	3.67	0.29	26.0	7.1	1.06	.280	2.03	35	2.38	59	6.97	5.6
4	Andrew Heaney A. Heaney	1.72	2025	PIT	5	2	1	.667	5	31	31.1	18	6	6	1	6	2	0	118	0	8.90	1.72	5.17	0.29	26.3	5.1	0.77	.218	1.72	42	2.22	57	5.17	5.9
5	Garrett Crochet G. Crochet	1.95	2025	BOS	6	2	2	.500	6	44	37.0	24	8	11	1	15	0	0	148	0	10.70	3.65	2.93	0.24	29.7	10.1	1.05	.261	2.68	47	2.21	55	5.84	7.5
6	Jesús Luzardo J. Luzardo	2.08	2025	PHI	5	2	0	1.000	5	36	30.1	26	7	8	1	7	0	0	120	1	10.68	2.08	5.14	0.30	30.0	5.8	1.09	.329	2.37	52	1.77	44	7.71	7.4
7	Shota Imanaga S. Imanaga	2.38	2025	CHC	6	2	1	.667	6	27	34.0	24	9	13	7	12	0	0	138	0	7.15	3.18	2.25	1.85	19.6	8.7	1.06	.185	3.44	61	5.17	134	6.35	-5.1
8	Matthew Boyd M. Boyd	2.54	2025	CHC	5	2	2	.500	5	24	28.1	29	8	11	3	10	2	0	123	0	7.62	3.18	2.40	0.95	19.5	8.1	1.38	.310	3.49	65	3.97	103	9.21	-0.4
9	Nick Lodolo N. Lodolo	2.79	2025	CIN	5	2	2	.500	5	18	29.0	24	9	10	4	4	3	0	118	0	5.59	1.24	4.50	1.24	15.3	3.4	0.97	.225	3.10	65	4.30	103	7.45	-0.3
10	Tarik Skubal T. Skubal	2.83	2025	DET	5	2	2	.500	5	29	28.2	27	9	9	3	5	0	0	116	0	9.10	1.57	5.80	0.94	25.0	4.3	1.12	.304	2.83	73	2.88	72	8.48	3.5
11	JP Sears	3.21	2025	ATH	5	3	2	.600	5	23	28.0	25	10	10	4	6	2	0	116	0	7.39	1.93	3.83	1.29	19.8	5.2	1.11	.259	3.21	86	4.09	105	8.04	-0.7
12	David Peterson D. Peterson	3.29	2025	NYM	5	1	1	.500	5	28	27.1	30	10	10	2	9	1	0	119	1	9.22	2.96	3.11	0.66	23.5	7.6	1.43	.354	3.29	85	3.02	78	9.88	2.6
13	MacKenzie Gore M. Gore	3.34	2025	WSH	6	2	3	.400	6	53	35.0	31	13	13	3	9	1	0	142	1	13.63	2.31	5.89	0.77	37.3	6.3	1.14	.368	3.34	84	1.96	50	7.97	7.7
14	Yusei Kikuchi Y. Kikuchi	3.38	2025	LAA	5	0	3	.000	5	28	29.1	23	11	12	4	14	0	0	121	0	8.59	4.30	2.00	1.23	23.1	11.6	1.26	.253	3.68	85	4.32	104	7.06	-0.5
15	Cristopher Sánchez C. Sánchez	3.42	2025	PHI	5	2	1	.667	5	33	26.1	26	10	11	4	8	2	0	112	2	11.28	2.73	4.13	1.37	29.5	7.1	1.29	.338	3.76	85	3.63	91	8.89	1.1
16	Carlos Rodón C. Rodón	3.50	2025	NYY	6	3	3	.500	6	45	36.0	20	14	16	5	18	0	0	143	1	11.25	4.50	2.50	1.25	31.5	12.6	1.06	.200	4.00	89	3.83	93	5.00	1.2
17	Matthew Liberatore M. Liberatore	3.60	2025	STL	4	1	2	.333	4	24	25.0	23	10	10	1	2	0	0	98	0	8.64	0.72	12.00	0.36	24.5	2.0	1.00	.310	3.60	91	1.86	48	8.28	5.6
18	Eduardo Rodriguez E. Rodriguez	4.40	2025	AZ	5	1	2	.333	5	34	28.2	30	14	17	3	7	0	0	123	2	10.67	2.20	4.86	0.94	27.6	5.7	1.29	.342	5.34	108	2.74	72	9.42	3.5
19	Cole Ragans C. Ragans	4.40	2025	KCR	6	1	1	.500	6	46	30.2	27	15	16	4	9	1	0	128	2	13.50	2.64	5.11	1.17	35.9	7.0	1.17	.338	4.70	107	2.70	67	7.92	4.5
20	Framber Valdez F. Valdez	4.50	2025	HOU	5	1	2	.333	5	26	28.0	27	14	14	2	11	2	0	119	1	8.36	3.54	2.36	0.64	21.8	9.2	1.36	.321	4.50	116	3.49	88	8.68	1.5
21	Kyle Freeland K. Freeland	4.85	2025	COL	5	0	4	.000	5	19	26.0	30	14	16	1	3	1	0	110	0	6.58	1.04	6.33	0.35	17.3	2.7	1.27	.337	5.54	107	2.52	61	10.38	4.5
22	Cade Povich C. Povich	5.04	2025	BAL	5	1	2	.333	5	23	25.0	34	14	17	4	9	0	0	114	2	8.28	3.24	2.56	1.44	20.2	7.9	1.72	.385	6.12	131	4.34	110	12.24	-1.2
23	Bailey Falter B. Falter	5.19	2025	PIT	5	1	2	.333	5	20	26.0	24	15	17	4	7	1	0	104	2	6.92	2.42	2.86	1.38	19.2	6.7	1.19	.278	5.88	126	4.41	112	8.31	-1.4