The Kansas City Cowboys had the worst winning percentage by a team in 1888, winning 32.6 percent of the time.

	TEAM	W%	SEASON	W	L	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	PA	TB	XBH	AVG	OBP	SLG	OPS
1	Cowboys	.326	1888	43	89	132	4,588	579	1,000	142	61	19	431	288	57	598	257	4,933	1,321	222	.218	.273	.288	.561
2	Colonels	.356	1888	48	87	139	4,881	689	1,177	183	67	14	543	322	69	591	318	5,272	1,536	264	.241	.297	.315	.612
3	Nationals	.358	1888	48	86	136	4,546	482	944	98	49	30	373	246	43	499	331	4,835	1,230	177	.208	.255	.271	.526
4	Hoosiers	.370	1888	50	85	136	4,623	603	1,100	180	33	34	427	236	43	492	350	4,902	1,448	247	.238	.281	.313	.595
5	Spiders	.379	1888	50	82	135	4,603	651	1,076	128	59	12	475	315	79	561	353	4,997	1,358	199	.234	.294	.295	.589
6	Orioles	.416	1888	57	80	137	4,656	653	1,068	162	70	19	455	298	58	478	326	5,012	1,427	251	.229	.284	.306	.591
7	Alleghenys	.493	1888	66	68	139	4,713	534	1,070	150	49	14	390	194	46	583	287	4,953	1,360	213	.227	.264	.289	.553
8	Wolverines	.519	1888	68	63	134	4,849	721	1,275	177	72	51	571	307	46	396	193	5,202	1,749	300	.263	.313	.361	.674
9	Beaneaters	.522	1888	70	64	137	4,834	669	1,183	167	89	56	535	282	32	524	293	5,148	1,696	312	.245	.291	.351	.642
10	Quakers	.531	1888	69	61	132	4,528	535	1,021	151	46	16	418	268	51	485	246	4,847	1,312	213	.225	.276	.290	.566
11	White Stockings	.570	1888	77	58	136	4,616	734	1,201	147	95	77	569	290	28	563	287	4,934	1,769	319	.260	.308	.383	.691
12	Red Stockings	.597	1888	80	54	137	4,801	745	1,161	132	82	32	571	345	60	559	469	5,206	1,553	246	.242	.301	.323	.624
13	Athletics	.609	1888	81	52	136	4,828	827	1,209	183	89	31	624	303	77	464	434	5,208	1,663	303	.250	.305	.344	.650
14	Bridegrooms	.629	1888	88	52	143	4,871	758	1,177	172	70	25	574	353	56	444	334	5,280	1,564	267	.242	.300	.321	.621
15	Giants	.641	1888	84	47	138	4,747	659	1,149	130	76	55	489	270	29	456	314	5,046	1,596	261	.242	.287	.336	.623
16	Browns	.681	1888	92	43	137	4,755	789	1,189	149	47	36	591	410	50	520	468	5,215	1,540	232	.250	.316	.324	.640