Jordan Lyles lost the most games in 2023, with 17 games.

Interpreted as:

worst MLB loss by a player 2023

	NAME	L	SEASON	TM	W	L%	G	W%	GS	ERA	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Jordan Lyles J. Lyles	17	2023	KCR	6	.739	31	.261	31	6.28	120	3	0	0	177.2	176	124	130	39	45	6	0	0	748	10	6.08	2.28	2.67	1.98	16.0	6.0	1.24	.255	6.59	140	5.62	131	8.92	-26.3
2	Patrick Corbin P. Corbin	15	2023	WSH	10	.600	32	.400	32	5.20	124	0	0	0	180.0	210	104	113	33	57	4	0	0	790	6	6.20	2.85	2.18	1.65	15.7	7.2	1.48	.309	5.65	120	5.27	119	10.50	-16.9
3	Lucas Giolito L. Giolito	15	2023	TOT	7	.682	33	.318	33	4.88	204	0	0	0	184.1	169	100	110	41	73	9	0	2	794	5	9.96	3.56	2.79	2.00	25.7	9.2	1.31	.274	5.37	113	5.26	120	8.25	-17.8
4	Zack Greinke Z. Greinke	15	2023	KCR	2	.882	30	.118	27	5.06	97	0	0	0	142.1	158	80	82	25	23	4	0	0	593	2	6.13	1.45	4.22	1.58	16.4	3.9	1.27	.300	5.19	113	4.74	111	9.99	-7.3
5	Kyle Freeland K. Freeland	14	2023	COL	5	.737	29	.263	29	5.03	94	0	0	0	155.2	187	87	96	29	42	1	0	0	677	2	5.43	2.43	2.24	1.68	13.9	6.2	1.47	.309	5.55	102	5.29	115	10.81	-11.2
6	Rich Hill R. Hill	14	2023	TOT	8	.636	32	.364	27	5.41	129	0	0	0	146.1	165	88	98	23	58	7	3	0	660	2	7.93	3.57	2.22	1.41	19.5	8.8	1.52	.321	6.03	123	4.86	111	10.15	-8.2
7	Johan Oviedo J. Oviedo	14	2023	PIT	9	.609	32	.391	32	4.31	158	1	1	0	177.2	161	85	91	19	83	13	0	1	781	7	8.00	4.20	1.90	0.96	20.2	10.6	1.37	.280	4.61	96	4.48	102	8.16	-2.2
8	Miles Mikolas M. Mikolas	13	2023	STL	9	.591	35	.409	35	4.78	137	0	0	0	201.1	226	107	110	26	39	8	0	0	860	4	6.12	1.74	3.51	1.16	15.9	4.5	1.32	.308	4.92	111	4.27	100	10.10	0.2
9	Patrick Sandoval P. Sandoval	13	2023	LAA	7	.650	28	.350	28	4.35	128	0	0	0	144.2	146	70	89	12	74	4	0	2	652	5	7.96	4.60	1.73	0.75	19.6	11.3	1.52	.309	5.54	100	4.18	95	9.08	3.8
10	Joey Wentz J. Wentz	13	2023	DET	3	.813	25	.188	19	6.90	98	0	0	0	105.2	131	81	87	25	47	0	0	0	492	2	8.35	4.00	2.09	2.13	19.9	9.6	1.68	.329	7.41	163	5.81	137	11.16	-18.6
11	Josiah Gray J. Gray	13	2023	WSH	8	.619	30	.381	30	3.91	143	0	0	0	159.0	152	69	72	22	80	9	0	1	698	9	8.09	4.53	1.79	1.25	20.5	11.5	1.46	.293	4.08	90	4.93	112	8.60	-8.9
12	Hunter Brown H. Brown	13	2023	HOU	11	.542	31	.458	29	5.09	178	0	0	0	155.2	157	88	94	26	55	9	1	0	665	4	10.29	3.18	3.24	1.50	26.8	8.3	1.36	.330	5.43	120	4.37	103	9.08	-2.3
13	Sandy Alcantara S. Alcantara	12	2023	MIA	7	.632	28	.368	28	4.14	151	3	1	0	184.2	176	85	91	22	48	5	0	0	762	4	7.36	2.34	3.15	1.07	19.8	6.3	1.21	.287	4.44	93	4.03	92	8.58	7.2
14	José Berríos J. Berríos	12	2023	TOR	11	.522	32	.478	32	3.65	184	0	0	0	189.2	173	77	82	25	52	9	0	3	782	4	8.73	2.47	3.54	1.19	23.5	6.6	1.19	.289	3.89	86	3.99	93	8.21	6.1
15	Michael Kopech M. Kopech	12	2023	CWS	5	.706	30	.294	27	5.43	134	0	0	0	129.1	115	78	80	29	91	11	2	0	591	9	9.32	6.33	1.47	2.02	22.7	15.4	1.59	.264	5.57	126	6.46	146	8.00	-28.5
16	Charlie Morton C. Morton	12	2023	ATL	14	.462	30	.538	30	3.64	183	0	0	0	163.1	150	66	70	14	83	12	0	2	716	4	10.08	4.57	2.20	0.77	25.6	11.6	1.43	.321	3.86	82	3.87	90	8.27	7.6
17	JP Sears	12	2023	OAK	5	.706	32	.294	32	4.54	161	0	0	0	172.1	165	87	90	34	53	16	0	2	735	2	8.41	2.77	3.04	1.78	21.9	7.2	1.26	.278	4.70	111	5.15	124	8.62	-19.9
18	Lance Lynn L. Lynn	11	2023	TOT	13	.458	32	.542	32	5.73	191	0	0	0	183.2	189	117	127	44	67	9	0	1	808	3	9.36	3.28	2.85	2.16	23.6	8.3	1.39	.292	6.22	133	5.53	125	9.26	-21.7
19	Jordan Montgomery J. Montgomery	11	2023	TOT	10	.524	32	.476	32	3.20	166	0	0	0	188.2	177	67	75	18	48	4	0	0	777	6	7.92	2.29	3.46	0.86	21.4	6.2	1.19	.294	3.58	75	3.56	83	8.44	15.8
20	Drew Smyly D. Smyly	11	2023	CHC	11	.500	41	.500	23	5.00	141	0	0	0	142.1	147	79	89	26	56	6	4	0	626	9	8.92	3.54	2.52	1.64	22.5	8.9	1.43	.305	5.63	118	4.95	115	9.30	-10.8
21	Adam Wainwright A. Wainwright	11	2023	STL	5	.688	21	.313	21	7.40	55	0	0	0	101.0	151	83	89	20	41	1	0	0	484	1	4.90	3.65	1.34	1.78	11.4	8.5	1.90	.357	7.93	172	5.98	140	13.46	-19.5
22	Logan Webb L. Webb	11	2023	SFG	10	.524	33	.476	33	3.25	194	2	1	0	216.0	201	78	83	20	31	5	0	0	850	1	8.08	1.29	6.26	0.83	22.8	3.6	1.07	.302	3.46	77	3.16	75	8.38	25.7
23	Framber Valdez F. Valdez	11	2023	HOU	12	.478	31	.522	31	3.45	200	2	2	0	198.0	166	76	86	19	57	10	0	0	808	6	9.09	2.59	3.51	0.86	24.8	7.1	1.13	.282	3.91	82	3.49	82	7.55	16.5
24	Brady Singer B. Singer	11	2023	KCR	8	.579	29	.421	29	5.52	133	0	0	0	159.2	182	98	102	20	49	8	0	0	702	3	7.50	2.76	2.71	1.13	18.9	7.0	1.45	.329	5.75	123	4.29	100	10.26	-0.1
25	Brayan Bello B. Bello	11	2023	BOS	12	.478	28	.522	28	4.24	132	0	0	0	157.0	165	74	77	24	45	6	0	0	668	1	7.57	2.58	2.93	1.38	19.8	6.7	1.34	.306	4.41	94	4.53	105	9.46	-3.5