The Athletics have managed a win percentage of .486 all-time.

	TEAM	W%	SEASON	W	L	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	Athletics	.544	1901	74	62	137	4,882	805	1,409	239	87	35	665	301	52	344	173		5,320	1,927	361	85				.289	.337	.395	.731
2	Athletics	.610	1902	83	53	137	4,762	775	1,369	235	67	38	673	343	38	288	201		5,261	1,852	340	118				.287	.340	.389	.729
3	Athletics	.556	1903	75	60	137	4,673	597	1,236	227	68	32	502	268	32	511	157		5,074	1,695	327	101				.264	.309	.363	.672
4	Athletics	.536	1904	81	70	155	5,088	557	1,266	197	77	31	486	313	40	600	137		5,578	1,710	305	137				.249	.298	.336	.634
5	Athletics	.622	1905	92	56	152	5,146	623	1,310	256	51	24	511	376	34	641	190		5,721	1,740	331	165				.255	.310	.338	.648
6	Athletics	.538	1906	78	67	149	4,883	555	1,206	213	49	32	489	385	43	666	166		5,475	1,613	294	164				.247	.308	.330	.638
7	Athletics	.607	1907	88	57	150	5,010	582	1,276	220	44	22	485	384	27	561	137		5,597	1,650	286	176				.255	.311	.329	.641
8	Athletics	.444	1908	68	85	157	5,065	487	1,131	183	50	21	392	368	37	595	116		5,656	1,477	254	186				.223	.281	.292	.572
9	Athletics	.621	1909	95	58	153	4,906	601	1,257	186	88	21	498	403	64	578	201		5,620	1,682	295	247				.256	.321	.343	.664
10	Athletics	.680	1910	102	48	155	5,154	671	1,373	191	105	19	541	409	47	573	207		5,809	1,831	315	199				.266	.326	.355	.681
11	Athletics	.669	1911	101	50	152	5,199	861	1,540	237	93	35	692	424	65	523	226		5,920	2,068	365	232				.296	.357	.398	.754
12	Athletics	.592	1912	90	62	153	5,111	779	1,442	204	108	22	620	485	38	556	258	168	5,835	1,928	334	201				.282	.349	.377	.726
13	Athletics	.627	1913	96	57	153	5,044	794	1,412	223	80	33	660	534	65	547	221		5,816	1,894	336	173				.280	.356	.375	.732
14	Athletics	.651	1914	99	53	158	5,126	749	1,392	165	80	29	627	545	52	517	231	188	5,941	1,804	274	218				.272	.348	.352	.699
15	Athletics	.283	1915	43	109	154	5,081	545	1,204	183	72	16	440	436	54	634	127	89	5,708	1,579	271	137				.237	.304	.311	.615
16	Athletics	.235	1916	36	117	154	5,010	447	1,212	169	65	19	380	406	30	631	151		5,603	1,568	253	157				.242	.303	.313	.616
17	Athletics	.359	1917	55	98	154	5,109	528	1,296	177	62	17	457	435	33	519	112		5,782	1,648	256	205				.254	.316	.323	.639
18	Athletics	.406	1918	52	76	130	4,278	412	1,039	124	44	22	356	343	26	485	83		4,771	1,317	190	124				.243	.303	.308	.611
19	Athletics	.257	1919	36	104	140	4,730	459	1,156	175	71	35	396	349	30	565	103		5,234	1,578	281	125				.244	.300	.334	.634
20	Athletics	.312	1920	48	106	156	5,263	558	1,325	219	49	44	465	352	45	575	50	67	5,829	1,774	312	169				.252	.304	.337	.641
21	Athletics	.346	1921	53	100	155	5,455	655	1,493	255	64	82	609	424	45	570	69	56	6,060	2,122	401	136				.274	.331	.389	.720
22	Athletics	.422	1922	65	89	155	5,216	704	1,409	229	63	111	631	438	34	590	60	69	5,857	2,097	403	169				.270	.331	.402	.733
23	Athletics	.454	1923	69	83	153	5,199	662	1,407	229	64	53	577	452	44	523	72	62	5,866	1,923	346	171				.271	.334	.370	.704
24	Athletics	.467	1924	71	81	152	5,187	683	1,460	250	59	63	608	384	39	480	77	68	5,767	2,017	372	157				.281	.336	.389	.725
25	Athletics	.579	1925	88	64	153	5,393	831	1,659	298	79	76	767	448	31	430	67	60	6,059	2,343	453	187				.308	.364	.434	.799
	Total	.486		9,382	9,926	19,395	657,430	85,613	169,215	29,332	5,342	14,244	78,909	64,742	4,754	99,683	12,148	3,220	740,736	251,963	48,918	10,690	3,120	2,276	10,669	.257	.327	.383	.710