Most Wins by a Team in a Season (MLB)

The 2001 Seattle Mariners hold the MLB team record for wins in a season, with 116. Next best is the 1906 Chicago Cubs, at 115.

MLB team record Seattle Mariners 2001 season, 162 games

116 Wins 1 clear of 1906 Chicago Cubs

#	Team	Season	G	W
1	Seattle Mariners	2001	162	116
2	Chicago Cubs	1906	154	115
3	New York Yankees	1998	162	114
4	Cleveland Indians	1954	156	111
4	Los Angeles Dodgers	2022	162	111
6	Pittsburgh Pirates	1909	154	110
6	New York Yankees	1927	155	110
8	New York Yankees	1961	163	109
8	Baltimore Orioles	1969	162	109
10	Baltimore Orioles	1970	162	108
10	Cincinnati Reds	1975	162	108
10	New York Mets	1986	162	108
10	Boston Red Sox	2018	162	108
14	Chicago Cubs	1907	155	107
14	Philadelphia Athletics	1931	153	107
14	New York Yankees	1932	156	107
14	Houston Astros	2019	162	107
14	San Francisco Giants	2021	162	107
19	New York Giants	1904	157	106
19	New York Yankees	1939	152	106
19	St. Louis Cardinals	1942	156	106
19	Atlanta Braves	1998	162	106
19	Los Angeles Dodgers	2019	162	106
19	Los Angeles Dodgers	2021	162	106
19	Houston Astros	2022	162	106
26	New York Giants	1905	155	105
26	Boston Red Sox	1912	154	105
26	St. Louis Cardinals	1943	157	105
26	St. Louis Cardinals	1944	157	105
26	Brooklyn Dodgers	1953	155	105
26	St. Louis Cardinals	2004	162	105
32	Chicago Cubs	1909	155	104
32	Chicago Cubs	1910	154	104
32	Philadelphia Athletics	1929	151	104
32	Brooklyn Dodgers	1942	155	104
32	Boston Red Sox	1946	156	104
32	New York Yankees	1963	161	104
32	Detroit Tigers	1984	162	104
32	Oakland Athletics	1988	162	104
32	Atlanta Braves	1993	162	104
32	Los Angeles Dodgers	2017	162	104
32	Atlanta Braves	2023	162	104
43	New York Giants	1912	154	103
43	New York Yankees	1942	154	103
43	New York Yankees	1954	155	103
43	San Francisco Giants	1962	165	103
43	Detroit Tigers	1968	164	103
43	New York Yankees	1980	162	103
43	Oakland Athletics	1990	162	103
43	San Francisco Giants	1993	162	103
43	Atlanta Braves	1999	162	103
43	New York Yankees	2002	161	103
43	Oakland Athletics	2002	162	103
43	New York Yankees	2009	162	103
43	Chicago Cubs	2016	162	103
43	Houston Astros	2018	162	103
43	New York Yankees	2019	162	103
43	Milwaukee Brewers	2026	162	103
59	Boston Beaneaters	1892	152	102
59	Boston Beaneaters	1898	152	102
59	Pittsburgh Pirates	1902	141	102
59	Philadelphia Athletics	1910	155	102
59	Philadelphia Athletics	1930	154	102
59	New York Yankees	1936	155	102
59	New York Yankees	1937	157	102
59	Los Angeles Dodgers	1962	165	102
59	Minnesota Twins	1965	162	102
59	Cincinnati Reds	1970	162	102
59	Los Angeles Dodgers	1974	162	102
59	Cincinnati Reds	1976	162	102
59	Kansas City Royals	1977	162	102
59	Baltimore Orioles	1979	159	102
59	Houston Astros	1998	162	102
59	Oakland Athletics	2001	162	102
59	Philadelphia Phillies	2011	162	102
59	Cleveland Indians	2017	162	102
77	Philadelphia Athletics	1911	152	101
77	New York Giants	1913	156	101
77	Boston Red Sox	1915	155	101
77	New York Yankees	1928	154	101
77	St. Louis Cardinals	1931	154	101
77	Detroit Tigers	1934	154	101
77	New York Yankees	1941	156	101
77	Detroit Tigers	1961	163	101
77	St. Louis Cardinals	1967	161	101
77	Baltimore Orioles	1971	158	101
77	Oakland Athletics	1971	161	101
77	Philadelphia Phillies	1976	162	101
77	Philadelphia Phillies	1977	162	101
77	St. Louis Cardinals	1985	162	101
77	Atlanta Braves	1997	162	101
77	Atlanta Braves	2002	161	101
77	Atlanta Braves	2003	162	101
77	New York Yankees	2003	163	101
77	New York Yankees	2004	162	101
77	Houston Astros	2017	162	101
77	Minnesota Twins	2019	162	101
77	Atlanta Braves	2022	162	101
77	New York Mets	2022	162	101
77	Baltimore Orioles	2023	162	101

A team's total is its players' numbers for the club added up, so a player traded mid-season counts for each team only what he did there. Rates such as ERA and batting average are worked out from the team's summed totals, not averaged across players.