The Baltimore Orioles have lost the most games by an AL team, with 10,119 losses.

Interpreted as:

al team with most regular-season losses all-time

	TEAM	L	W	L%	G	W%	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Orioles	10,119	9,139	.525	19,368	.475	657,899	83,625	169,761	29,340	4,912	14,439	77,318	63,310	4,479	98,417	10,559	2,785	739,324	252,242	48,691	10,532	3,104	2,576	10,848	.258	.326	.383	.709
2	Twins	9,979	9,289	.518	19,377	.482	661,002	85,194	173,340	29,764	6,334	12,022	78,434	62,374	5,165	94,526	12,016	3,081	741,898	251,838	48,120	10,190	3,167	2,664	10,977	.262	.329	.381	.710
3	Athletics	9,891	9,352	.514	19,330	.486	655,213	85,313	168,656	29,208	5,333	14,149	78,615	64,538	4,734	99,078	12,111	3,207	738,271	250,977	48,690	10,682	3,104	2,272	10,628	.257	.327	.383	.710
4	White Sox	9,650	9,611	.501	19,364	.499	655,643	84,098	170,229	28,220	5,551	12,294	77,305	62,117	5,249	92,132	13,632	3,484	738,600	246,433	46,065	12,368	3,223	2,461	10,522	.260	.327	.376	.703
5	Tigers	9,587	9,712	.497	19,392	.503	661,287	89,054	174,705	29,605	6,296	14,585	82,006	65,574	4,450	96,795	11,292	2,938	745,430	260,657	50,486	11,009	3,110	2,448	10,720	.264	.333	.394	.727
6	Guardians	9,394	9,881	.487	19,366	.513	660,051	87,549	174,722	31,159	5,499	13,923	80,913	62,643	4,838	94,662	11,914	3,390	742,354	258,648	50,581	11,464	3,358	2,545	10,529	.265	.331	.392	.723
7	Red Sox	9,293	9,982	.482	19,358	.518	662,539	90,402	176,786	33,136	5,600	14,612	83,836	66,836	4,807	95,634	9,638	2,552	748,118	264,958	53,348	10,596	3,340	2,998	11,552	.267	.337	.400	.737
8	Yankees	8,168	10,812	.430	19,068	.570	649,886	92,671	172,534	28,650	5,497	17,329	86,109	68,619	4,930	94,894	11,655	2,802	736,319	264,165	51,476	9,595	3,289	2,836	10,687	.265	.339	.406	.745
9	Rangers	5,331	4,845	.524	10,182	.476	347,564	45,795	89,628	15,972	1,892	10,204	43,271	32,909	2,702	65,240	5,952	2,849	388,971	139,996	28,068	2,963	2,833	2,251	7,796	.258	.324	.403	.727
10	Angels	5,144	5,046	.505	10,193	.495	345,829	44,108	88,478	15,299	1,811	9,228	41,505	32,335	2,827	62,816	6,049	3,101	387,303	135,083	26,338	3,538	2,774	2,484	7,878	.256	.322	.391	.713
11	Royals	4,650	4,237	.523	8,889	.477	304,044	38,858	79,842	14,926	2,291	7,005	36,673	26,009	2,464	52,181	7,096	2,899	337,560	120,365	24,222	2,371	2,672	1,868	6,782	.263	.323	.396	.719
12	Mariners	3,973	3,629	.523	7,604	.477	259,387	33,765	66,647	12,425	1,259	7,738	32,077	24,597	2,355	49,790	5,025	2,170	290,362	104,804	21,422	1,947	2,076	1,664	5,683	.257	.325	.404	.729
13	Blue Jays	3,816	3,787	.502	7,606	.498	260,580	35,146	67,754	13,539	1,492	8,262	33,336	24,173	2,427	49,014	4,576	1,963	290,810	109,063	23,293	1,503	2,127	1,403	5,933	.260	.326	.419	.745
14	Brewers	2,367	2,200	.518	4,570	.482	155,611	20,203	40,437	7,010	1,037	3,789	18,992	14,680	932	24,420	3,135	1,734	174,383	60,888	11,836	1,784	1,376	1,156	3,354	.260	.325	.391	.716
15	Rays	2,206	2,118	.510	4,324	.490	147,002	19,207	37,300	7,434	850	4,503	18,274	13,980	1,676	33,458	3,222	1,228	164,553	59,943	12,787	738	1,157	685	3,029	.254	.323	.408	.731
16	Astros	856	1,039	.452	1,895	.548	64,474	8,976	16,527	3,329	239	2,439	8,581	6,130	719	14,941	1,073	403	72,059	27,651	6,007	216	520	259	1,502	.256	.325	.429	.754
17	Orioles	153	118	.565	276	.435	9,349	1,476	2,666	381	218	57	1,231	786	106	797	396		10,459	3,654	656	218				.285	.347	.391	.738