Since 2015, Patrick Corbin has lost the most games, with 121 games.

Interpreted as:

most regular-season loses by a pitcher since 2015

	NAME	L	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	Patrick Corbin P. Corbin	121	87	.582	301	.418	288	4.62	1,518	4	2	1	1648.1	1,778	847	917	241	523	36	6	20	7,127	50	8.29	2.86	2.90	1.32	21.3	7.3	1.40	.320	5.01	109	4.24	100	9.71	-1.2
2	Kevin Gausman K. Gausman	96	97	.497	304	.503	280	3.85	1,712	2	1	0	1643.0	1,591	702	754	209	458	36	8	8	6,882	50	9.38	2.51	3.74	1.14	24.9	6.7	1.25	.309	4.13	92	3.63	85	8.72	111.7
3	Kyle Gibson K. Gibson	95	96	.497	293	.503	287	4.55	1,384	3	1	0	1647.2	1,690	833	892	214	587	61	0	15	7,074	57	7.56	3.21	2.36	1.17	19.6	8.3	1.38	.306	4.87	107	4.35	102	9.23	-17.7
4	Aaron Nola A. Nola	86	105	.450	277	.550	277	3.78	1,831	6	4	0	1671.0	1,482	701	739	210	437	55	0	16	6,855	18	9.86	2.35	4.19	1.13	26.7	6.4	1.15	.294	3.98	90	3.49	81	7.98	145.8
5	Kyle Hendricks K. Hendricks	85	95	.472	277	.528	271	3.80	1,265	6	4	0	1577.0	1,506	666	714	192	371	64	4	17	6,523	12	7.22	2.12	3.41	1.10	19.4	5.7	1.19	.284	4.07	92	3.96	96	8.59	32.2
6	Sonny Gray S. Gray	83	98	.459	276	.541	269	3.62	1,559	4	2	0	1534.0	1,331	617	673	158	504	49	2	3	6,365	88	9.15	2.96	3.09	0.93	24.5	7.9	1.20	.286	3.95	86	3.55	84	7.81	114.6
7	Luis Castillo L. Castillo	81	76	.516	226	.484	226	3.54	1,403	1	0	0	1315.1	1,118	518	566	162	435	43	0	8	5,438	17	9.60	2.98	3.23	1.11	25.8	8.0	1.18	.282	3.87	85	3.73	88	7.65	73.4
8	Kyle Freeland K. Freeland	81	60	.574	219	.426	214	4.52	877	0	0	0	1171.1	1,299	588	639	166	369	43	0	11	5,085	16	6.74	2.84	2.38	1.28	17.2	7.3	1.42	.312	4.91	94	4.56	103	9.98	-15.9
9	Jose Quintana J. Quintana	81	82	.497	278	.503	255	3.82	1,339	2	2	0	1481.1	1,444	628	674	160	462	44	5	14	6,234	56	8.14	2.81	2.90	0.97	21.5	7.4	1.29	.304	4.09	92	3.77	90	8.77	66.8
10	José Berríos J. Berríos	80	101	.442	259	.558	258	4.06	1,419	5	1	0	1493.0	1,394	673	716	205	450	94	0	7	6,272	35	8.55	2.71	3.15	1.24	22.6	7.2	1.24	.290	4.32	96	4.14	98	8.40	20.1
11	Marcus Stroman M. Stroman	80	76	.513	238	.487	235	3.78	1,100	3	1	1	1337.0	1,311	562	628	134	415	36	2	4	5,611	38	7.40	2.79	2.65	0.90	19.6	7.4	1.29	.300	4.23	91	3.83	90	8.82	65.2
12	Carlos Carrasco C. Carrasco	79	93	.459	244	.541	229	4.14	1,383	8	3	1	1301.1	1,267	599	630	180	349	47	6	13	5,420	50	9.56	2.41	3.96	1.24	25.5	6.4	1.24	.314	4.36	98	3.74	89	8.76	69.1
13	José Ureña J. Ureña	77	44	.636	241	.364	154	4.78	645	1	0	6	966.2	998	513	550	134	359	49	33	26	4,192	24	6.01	3.34	1.80	1.25	15.4	8.6	1.40	.288	5.12	116	4.89	118	9.29	-83
14	Madison Bumgarner M. Bumgarner	75	67	.528	207	.472	207	3.79	1,174	10	4	0	1256.2	1,155	529	573	174	315	60	0	15	5,217	15	8.41	2.26	3.73	1.25	22.5	6.0	1.17	.281	4.10	93	3.98	100	8.27	-3.1
15	Martín Pérez M. Pérez	75	76	.497	278	.503	239	4.47	983	1	1	0	1382.0	1,498	687	761	165	508	45	12	9	6,012	28	6.40	3.31	1.94	1.07	16.4	8.4	1.45	.309	4.96	101	4.49	103	9.76	-23.1
16	Jordan Lyles J. Lyles	74	51	.592	263	.408	158	5.29	796	4	0	1	1005.1	1,068	591	630	174	330	38	33	9	4,355	47	7.13	2.95	2.41	1.56	18.3	7.6	1.39	.296	5.64	122	4.93	116	9.56	-74.5
17	Nick Pivetta N. Pivetta	73	63	.537	238	.463	193	4.67	1,230	2	0	3	1113.1	1,045	578	604	186	401	32	13	6	4,725	52	9.94	3.24	3.07	1.50	26.0	8.5	1.30	.299	4.88	109	4.29	101	8.45	-6.7
18	Matthew Boyd M. Boyd	72	52	.581	197	.419	183	4.67	970	2	1	0	994.0	976	516	552	167	315	49	2	7	4,242	31	8.78	2.85	3.08	1.51	22.9	7.4	1.30	.295	5.00	108	4.49	104	8.84	-20.3
19	Lance Lynn L. Lynn	71	93	.433	245	.567	243	3.86	1,416	2	1	0	1390.1	1,289	597	664	185	481	60	0	16	5,918	44	9.17	3.11	2.94	1.20	23.9	8.1	1.27	.292	4.30	91	4.03	94	8.34	40.1
20	Robbie Ray R. Ray	71	84	.458	239	.542	238	3.81	1,626	1	1	0	1317.1	1,122	557	595	196	559	47	0	19	5,559	55	11.11	3.82	2.91	1.34	29.2	10.1	1.28	.296	4.07	90	3.99	97	7.67	16.4
21	Chris Archer C. Archer	70	43	.619	182	.381	181	4.11	1,144	1	1	0	1004.1	925	459	503	135	353	24	0	5	4,254	55	10.25	3.16	3.24	1.21	26.9	8.3	1.27	.304	4.51	101	3.74	91	8.29	42.3
22	Jon Gray J. Gray	70	72	.493	228	.507	223	4.45	1,211	2	1	0	1216.2	1,191	602	641	155	401	51	3	13	5,172	44	8.96	2.97	3.02	1.15	23.4	7.8	1.31	.309	4.74	97	3.95	90	8.81	57.2
23	Tyler Anderson T. Anderson	69	62	.527	220	.473	212	4.28	1,006	1	0	0	1203.2	1,164	573	613	171	389	39	1	11	5,104	41	7.52	2.91	2.59	1.28	19.7	7.6	1.29	.284	4.58	98	4.40	103	8.70	-15.8
24	Charlie Morton C. Morton	69	106	.394	265	.606	259	3.84	1,606	0	0	0	1446.0	1,268	617	666	156	531	127	1	11	6,115	33	10.00	3.30	3.02	0.97	26.3	8.7	1.24	.301	4.15	93	3.71	90	7.89	70.4
25	Gerrit Cole G. Cole	68	132	.340	276	.660	276	3.14	2,013	8	5	0	1698.2	1,391	592	639	199	432	49	0	7	6,821	45	10.67	2.29	4.66	1.05	29.5	6.3	1.07	.289	3.39	76	3.17	75	7.37	198.3