Worst Seasons In Seattle Mariners History

What is the worst season in Seattle Mariners history?

The worst season in Seattle Mariners franchise history is 56-104, set by the 1978 Seattle Mariners. The 1978 Mariners have both the most losses and the worst winning percentage in Seattle Mariners franchise history.

Worst Seattle Mariners Seasons

By Worst Winning Percentage By Worst Win %
By Most Losses

	Year	Record	RD
1	1978	56-104	-220
2	1980	59-103	-183
3	1983	60-102	-182
4	2010	61-101	-185
	2008	61-101	-140
6	2004	63-99	-125
7	1977	64-98	-231
	1992	64-98	-120
9	1981	44-65	-95
10	2011	67-95	-119
	1986	67-95	-117
	1979	67-95	-109
13	2019	68-94	-135
14	1988	68-93	-80
15	2005	69-93	-52
16	1994	49-63	-47
17	2013	71-91	-130
18	2020	27-33	-49
19	1989	73-89	-34
20	1985	74-88	-99
	1984	74-88	-92
22	2012	75-87	-32
23	2015	76-86	-70
	1982	76-86	-61
25	1998	76-85	+4

	Year	Record	RD
1	1978	56-104	-220
2	1980	59-103	-183
3	1983	60-102	-182
4	2010	61-101	-185
	2008	61-101	-140
6	2004	63-99	-125
7	1977	64-98	-231
	1992	64-98	-120
9	2011	67-95	-119
	1986	67-95	-117
	1979	67-95	-109
12	2019	68-94	-135
13	1988	68-93	-80
	2005	69-93	-52
15	2013	71-91	-130
16	1989	73-89	-34
17	1985	74-88	-99
	1984	74-88	-92
19	2012	75-87	-32
20	2015	76-86	-70
	1982	76-86	-61
22	1998	76-85	+4
	1990	77-85	-40
24	1987	78-84	-41
	2006	78-84	-36
	2017	78-84	-22

What was the worst start to a Seattle Mariners season?

The worst start to a Seattle Mariners season was the 1991 Seattle Mariners, who started the season at 0-6. The second worst starts to a Seattle Mariners season were the 2004 Seattle Mariners and the 1994 Seattle Mariners, who both started the season with 5 losses.

Who was the worst Seattle Mariners team that still made the postseason?

Based on win percentage, the worst team in Seattle Mariners franchise history that still made the postseason was the 1995 Seattle Mariners, who finished the season 79-66. They eventually lost to the Cleveland Indians in the AL Championship Series.