Since 2020, Nick Pivetta has lost the most games for the Red Sox, with 41 games.

Interpreted as:

red sox with most regular-season losses since 2020

	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	Nick Pivetta N. Pivetta	41	37	.526	131	.474	107	4.29	718	1	0	2	633.0	558	302	312	103	229	17	4	4	2,658	28	10.21	3.26	3.14	1.46	27.0	8.6	1.24	.286	4.44	99	4.18	100	7.93	0.4
2	Tanner Houck T. Houck	32	24	.571	113	.429	80	3.97	449	1	1	9	474.1	429	209	233	43	158	40	16	5	2,004	12	8.52	3.00	2.84	0.82	22.4	7.9	1.24	.294	4.42	91	3.70	89	8.14	25.6
3	Kutter Crawford K. Crawford	31	17	.646	86	.354	69	4.56	389	0	0	0	392.1	348	199	210	64	118	16	8	1	1,633	12	8.92	2.71	3.30	1.47	23.8	7.2	1.19	.272	4.82	106	4.34	105	7.98	-7.5
4	Brayan Bello B. Bello	28	30	.483	80	.517	78	4.37	373	1	0	0	422.2	446	205	217	49	160	22	0	1	1,845	9	7.94	3.41	2.33	1.04	20.2	8.7	1.43	.320	4.62	101	4.21	101	9.50	-1.4
5	Josh Winckowski J. Winckowski	14	13	.519	121	.481	21	4.20	195	0	0	5	242.1	266	113	132	29	89	10	29	6	1,071	3	7.24	3.31	2.19	1.08	18.2	8.3	1.46	.317	4.90	99	4.34	105	9.88	-5
6	Nathan Eovaldi N. Eovaldi	14	21	.400	61	.600	61	3.79	350	2	1	0	340.0	348	143	156	44	62	12	0	2	1,423	10	9.26	1.64	5.65	1.16	24.6	4.4	1.21	.318	4.13	86	3.42	82	9.21	30.2
7	Martín Pérez M. Pérez	13	10	.565	48	.435	34	4.65	143	0	0	0	176.0	191	91	104	27	64	12	6	2	771	4	7.31	3.27	2.23	1.38	18.5	8.3	1.45	.312	5.32	101	4.83	111	9.77	-9.1
8	Matt Barnes M. Barnes	12	7	.632	128	.368	0	4.07	149	0	0	41	117.1	95	53	60	14	55	7	74	4	500	11	11.43	4.22	2.71	1.07	29.8	11.0	1.28	.295	4.60	92	3.74	89	7.29	6.3
9	Garrett Whitlock G. Whitlock	11	22	.333	126	.667	23	3.39	291	0	0	9	273.1	253	103	114	32	66	11	27	2	1,126	10	9.58	2.17	4.41	1.05	25.8	5.9	1.17	.304	3.75	78	3.40	81	8.33	23.8
10	Kenley Jansen K. Jansen	8	7	.533	105	.467	0	3.44	114	0	0	55	99.1	78	38	41	9	37	3	80	3	406	3	10.33	3.35	3.08	0.82	28.1	9.1	1.16	.284	3.71	79	3.29	78	7.07	10.1
11	Rich Hill R. Hill	8	8	.500	30	.500	26	4.29	114	0	0	0	128.0	126	61	69	16	40	5	1	0	541	0	8.02	2.81	2.85	1.13	21.1	7.4	1.30	.301	4.85	104	4.01	101	8.86	-0.3
12	Garrett Richards G. Richards	8	7	.533	40	.467	22	4.87	115	0	0	3	136.2	158	74	86	19	60	5	4	1	617	7	7.57	3.95	1.92	1.25	18.6	9.7	1.60	.333	5.66	106	4.71	109	10.40	-5.9
13	Eduardo Rodriguez E. Rodriguez	8	13	.381	32	.619	31	4.74	185	0	0	0	157.2	172	83	87	19	47	2	0	0	675	0	10.56	2.68	3.94	1.08	27.4	7.0	1.39	.363	4.97	103	3.31	77	9.82	17.5
14	Chris Sale C. Sale	7	11	.389	31	.611	31	3.93	182	0	0	0	151.0	137	66	74	21	42	13	0	1	633	3	10.85	2.50	4.33	1.25	28.8	6.6	1.19	.309	4.41	87	3.71	86	8.17	10
15	Justin Slaten J. Slaten	6	7	.462	68	.538	0	3.09	74	0	0	5	78.2	61	27	33	5	16	2	15	2	314	4	8.47	1.83	4.63	0.57	23.6	5.1	0.98	.258	3.78	73	2.76	67	6.98	11.8
16	Brennan Bernardino B. Bernardino	6	8	.429	142	.571	9	3.45	137	0	0	0	128.0	116	49	57	11	51	15	19	9	556	11	9.63	3.59	2.69	0.77	24.6	9.2	1.30	.307	4.01	79	3.70	88	8.16	7.1
17	Corey Kluber C. Kluber	6	3	.667	15	.333	9	7.04	42	0	0	1	55.0	69	43	47	17	21	4	1	0	257	1	6.87	3.44	2.00	2.78	16.3	8.2	1.64	.301	7.69	155	7.11	164	11.29	-16.8
18	James Paxton J. Paxton	6	8	.429	22	.571	22	4.46	110	0	0	0	107.0	106	53	59	19	35	2	0	0	458	5	9.25	2.94	3.14	1.60	24.0	7.6	1.32	.298	4.96	99	4.53	105	8.92	-2.6
19	Cooper Criswell C. Criswell	5	7	.417	31	.583	18	4.24	77	0	0	1	108.1	117	51	61	12	34	7	8	0	470	2	6.40	2.82	2.26	1.00	16.4	7.2	1.39	.309	5.07	100	4.30	104	9.72	-2.1
20	Zack Kelly Z. Kelly	5	8	.385	81	.615	3	4.36	93	0	0	0	95.0	81	46	54	13	43	6	14	3	410	3	8.81	4.07	2.16	1.23	22.7	10.5	1.31	.267	5.12	103	4.51	109	7.67	-4.1
21	John Schreiber J. Schreiber	5	6	.455	111	.545	2	2.90	132	0	0	9	114.2	90	37	42	9	45	8	19	2	474	5	10.36	3.53	2.93	0.71	27.8	9.5	1.18	.289	3.30	67	3.27	79	7.06	10.8
22	Walker Buehler W. Buehler	4	4	.500	10	.500	10	5.18	44	0	0	0	48.2	53	28	30	10	17	5	0	0	216	0	8.14	3.14	2.59	1.85	20.4	7.9	1.44	.307	5.55	123	5.28	129	9.80	-6.3
23	Sean Newcomb S. Newcomb	4	0	1.000	12	.000	5	3.95	41	0	0	0	41.0	55	18	24	3	17	2	5	0	190	2	9.00	3.73	2.41	0.66	21.6	8.9	1.76	.409	5.27	94	3.40	83	12.07	3.1
24	Garrett Crochet G. Crochet	4	6	.400	14	.600	14	2.35	110	0	0	0	88.0	67	23	26	8	27	0	0	0	352	0	11.25	2.76	4.07	0.82	31.3	7.7	1.07	.285	2.66	56	2.66	65	6.85	13.9
25	Richard Fitts R. Fitts	4	0	1.000	9	.000	9	3.24	24	0	0	0	41.2	39	15	18	5	14	1	0	0	176	2	5.18	3.02	1.71	1.08	13.6	8.0	1.27	.258	3.89	77	4.60	112	8.42	-2.2