who won the most games by exactly one run in 2021

The Seattle Mariners had the most wins by a team with a run differential of exactly 1 in 2021, with 33 wins.

	TEAM	W	DIFF	SEASON	L	W%	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Mariners	33	33	2021	0	1.000	33	1,065	145	246	43	1	47	140	109	15	290	16	6	1,198	432	91	3	6	2	19	.231	.310	.406	.715
2	Mets	31	31	2021	0	1.000	31	986	131	263	57	1	29	124	87	19	235	8	4	1,109	409	87	12	5	6	28	.267	.336	.415	.751
3	Giants	31	31	2021	0	1.000	31	1,029	134	243	48	4	42	129	125	15	259	16	5	1,183	425	94	5	9	11	19	.236	.325	.413	.738
4	Phillies	30	30	2021	0	1.000	30	972	130	218	42	3	38	122	89	6	268	19	3	1,088	380	83	13	8	12	12	.224	.291	.391	.682
5	Yankees	28	28	2021	0	1.000	28	915	112	201	38	0	38	107	113	6	284	19	4	1,041	353	76	1	6	4	24	.220	.308	.386	.693
6	Cardinals	26	26	2021	0	1.000	26	838	108	201	42	4	31	106	65	14	232	24	7	931	344	77	5	9	8	18	.240	.302	.411	.713
7	Braves	26	26	2021	0	1.000	26	835	123	196	48	3	38	118	90	13	219	12	3	947	364	89	4	5	15	8	.235	.317	.436	.753
8	Red Sox	26	26	2021	0	1.000	26	858	113	208	40	1	30	105	82	8	223	11	5	961	340	71	5	8	4	20	.242	.312	.396	.708
9	Twins	25	25	2021	0	1.000	25	835	112	205	47	4	26	104	82	11	188	10	5	937	338	77	1	8	5	14	.246	.318	.405	.723
10	Angels	25	25	2021	0	1.000	25	815	118	206	40	2	30	115	75	12	210	12	7	914	340	72	6	6	6	15	.253	.323	.417	.740
11	Rockies	24	24	2021	0	1.000	24	781	117	201	37	5	34	113	79	9	201	13	5	889	350	76	13	7	5	16	.257	.330	.448	.778
12	Reds	24	24	2021	0	1.000	24	801	112	208	47	0	32	108	87	23	205	9	7	927	351	79	8	8	9	19	.260	.346	.438	.784
13	Cubs	24	24	2021	0	1.000	24	784	98	193	32	3	24	96	85	8	226	16	9	890	303	59	8	5	9	22	.246	.324	.386	.711
14	Dodgers	24	24	2021	0	1.000	24	753	83	173	39	4	30	82	72	7	217	7	5	842	310	73	4	6	4	16	.230	.301	.412	.712
15	Athletics	23	23	2021	0	1.000	23	757	98	180	43	2	24	89	94	20	188	12	7	883	299	69	3	9	10	17	.238	.334	.395	.729
16	Tigers	23	23	2021	0	1.000	23	764	97	182	30	4	18	92	74	11	218	17	3	861	274	52	7	5	2	15	.238	.313	.359	.671
17	Nationals	22	22	2021	0	1.000	22	703	88	189	37	2	24	85	69	13	168	8	6	795	302	63	9	1	7	21	.269	.345	.430	.774
18	Astros	21	21	2021	0	1.000	21	703	91	174	38	0	29	89	68	5	165	7	1	782	299	67	3	3	6	12	.248	.317	.425	.742
19	Marlins	21	21	2021	0	1.000	21	685	85	162	28	4	19	79	68	11	205	17	4	773	255	51	6	3	8	12	.236	.314	.372	.686
20	Royals	21	21	2021	0	1.000	21	701	96	171	33	4	26	91	44	9	153	23	6	770	290	63	9	7	3	8	.244	.294	.414	.708
21	Padres	21	21	2021	0	1.000	21	681	96	168	32	4	17	89	87	9	184	19	3	795	259	53	5	13	6	15	.247	.334	.380	.715
22	Brewers	21	21	2021	0	1.000	21	703	89	161	29	2	22	85	82	10	201	10	4	805	260	53	6	4	6	10	.229	.317	.370	.686
23	Pirates	20	20	2021	0	1.000	20	676	92	177	35	6	12	87	74	4	152	7	5	768	260	53	6	8	7	12	.262	.335	.385	.719
24	Rays	20	20	2021	0	1.000	20	665	85	157	27	10	19	78	71	10	194	12	6	753	261	56	1	6	4	6	.236	.316	.392	.709
25	White Sox	18	18	2021	0	1.000	18	574	82	141	27	0	20	74	68	9	146	3	5	659	228	47	6	2	2	14	.246	.334	.397	.731