what mlb team has the worst record before the all-star break in a single season

The Pittsburgh Pirates have the worst record by a team in a season before the All-Star Game, with a record of 21-59 in 1952.

	TEAM	REC	SEASON	W%	G	W	L	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Pirates	21-59	1952	.263	80	21	59	2,622	265	581	94	15	45	243	277	14	373	27	24	2,948	840	154	35			51	.222	.299	.320	.620
2	Athletics	25-69	1979	.266	94	25	69	3,120	327	726	103	15	64	315	300	11	422	50	47	3,499	1,051	182	44	24	23	71	.233	.300	.337	.637
3	Phillies	20-54	1941	.270	74	20	54	2,468	228	569	81	18	35	213	233	12	301	24		2,753	791	134	40			68	.231	.300	.321	.621
4	Athletics	25-67	2023	.272	92	25	67	3,040	329	673	120	12	85	317	296	50	845	91	19	3,423	1,072	217	18	19	8	65	.221	.299	.353	.652
5	Tigers	25-67	2003	.272	92	25	67	3,070	297	700	111	24	75	279	254	28	623	51	40	3,424	1,084	210	42	30	13	51	.228	.290	.353	.643
6	Browns	19-50	1935	.275	69	19	50	2,357	286	608	119	21	35	275	262	9	257	6		2,677	874	175	49				.258	.334	.371	.705
7	White Sox	27-71	2024	.276	98	27	71	3,237	313	713	145	5	85	298	256	29	843	63	14	3,553	1,123	235	14	17	6	78	.220	.282	.347	.629
8	Blue Jays	16-42	1981	.276	58	16	42	1,960	186	427	72	16	36	180	161	11	323	44	28	2,165	639	124	22	11	10	34	.218	.280	.326	.606
9	Phillies	21-54	1942	.280	75	21	54	2,532	197	592	87	23	26	183	164	9	228	21		2,740	803	136	35			48	.234	.283	.317	.600
10	Mets	23-59	1962	.280	82	23	59	2,787	329	667	87	20	74	304	319	18	513	25	15	3,182	1,016	181	29	29	10	71	.239	.318	.365	.683
11	Phillies	24-61	1997	.282	85	24	61	2,847	306	700	164	17	58	285	268	17	521	41	26	3,190	1,072	239	32	26	13	64	.246	.312	.377	.688
12	Diamondbacks	26-66	2021	.283	92	26	66	3,127	381	723	159	17	82	358	307	35	834	22	10	3,499	1,162	258	13	17	10	52	.231	.306	.372	.677
13	Browns	21-53	1939	.284	74	21	53	2,596	360	714	119	32	42	341	275	11	273	22		2,947	1,023	193	65			58	.275	.347	.394	.741
14	Mets	23-58	1964	.284	82	23	58	2,806	265	673	101	14	45	248	167	27	487	22	16	3,032	937	160	24	8	13	84	.240	.288	.334	.622
15	Royals	27-68	2018	.284	95	27	68	3,237	337	773	158	13	78	318	240	49	740	43	22	3,560	1,191	249	10	24	7	82	.239	.299	.368	.667
16	Royals	26-65	2023	.286	91	26	65	3,031	337	702	145	21	78	322	238	45	829	76	24	3,350	1,123	244	8	28	6	51	.232	.295	.371	.665
17	Braves	21-52	1935	.288	73	21	52	2,527	298	675	115	18	42	283	183	10	213	5		2,751	952	175	31				.267	.319	.377	.696
18	Cubs	15-37	1981	.288	54	15	37	1,798	179	425	72	14	26	172	170	7	293	39	17	2,011	603	112	20	16	17	47	.236	.302	.335	.638
19	Orioles	28-69	2018	.289	97	28	69	3,296	345	748	151	9	111	334	264	34	845	36	10	3,617	1,250	271	5	18	17	80	.227	.290	.379	.669
20	Phillies	23-55	1961	.295	79	23	55	2,644	304	623	97	22	42	285	234	25	492	30	18	2,972	890	161	55	14	26	67	.236	.302	.337	.639
21	Orioles	23-55	1955	.295	79	23	55	2,628	243	596	90	17	33	229	270	8	367	21	29	2,956	819	140	39	11	19	64	.227	.300	.312	.611
22	Phillies	19-45	1938	.297	64	19	45	2,222	266	587	102	12	27	249	220	5	245	17		2,479	794	141	32				.264	.332	.357	.689
23	Browns	22-52	1951	.297	74	22	52	2,481	296	588	103	25	46	271	275	9	350	19	24	2,820	879	174	55			81	.237	.315	.354	.670
24	Athletics	23-54	1965	.299	77	23	54	2,574	274	618	95	39	52	256	257	18	492	46	15	2,895	947	186	25	21	18	58	.240	.311	.368	.679
25	Nationals	26-61	2009	.299	87	26	61	2,995	381	791	157	17	80	367	347	31	670	36	18	3,420	1,222	254	31	16	22	78	.264	.345	.408	.753