9 league titles: 1989, 1974, 1973, 1972, 1930, 1929, 1913, 1911, 1910.
Franchise history
Regular-season record. Division finish uses that season's division alignment.
| 2026 | 64 | 98 | .395 | 4th AL West | — |
| 2025 | 76 | 86 | .469 | 4th AL West | — |
| 2024 | 69 | 93 | .426 | 4th AL West | — |
| 2023 | 50 | 112 | .309 | 5th AL West | — |
| 2022 | 60 | 102 | .370 | 5th AL West | — |
| 2021 | 86 | 76 | .531 | 3rd AL West | — |
| 2020 | 36 | 24 | .600 | 1st AL West | Playoffs3-4 |
| 2019 | 97 | 65 | .599 | 2nd AL West | Playoffs0-1 |
| 2018 | 97 | 65 | .599 | 2nd AL West | Playoffs0-1 |
| 2017 | 75 | 87 | .463 | 5th AL West | — |
| 2016 | 69 | 93 | .426 | 5th AL West | — |
| 2015 | 68 | 94 | .420 | 5th AL West | — |
| 2014 | 88 | 74 | .543 | 2nd AL West | Playoffs0-1 |
| 2013 | 96 | 66 | .593 | 1st AL West | Playoffs2-3 |
| 2012 | 94 | 68 | .580 | 1st AL West | Playoffs2-3 |
| 2011 | 74 | 88 | .457 | 3rd AL West | — |
| 2010 | 81 | 81 | .500 | 2nd AL West | — |
| 2009 | 75 | 87 | .463 | 4th AL West | — |
| 2008 | 75 | 86 | .466 | 3rd AL West | — |
| 2007 | 76 | 86 | .469 | 3rd AL West | — |
| 2006 | 93 | 69 | .574 | 1st AL West | Playoffs3-4 |
| 2005 | 88 | 74 | .543 | 2nd AL West | — |
| 2004 | 91 | 71 | .562 | 2nd AL West | — |
| 2003 | 96 | 66 | .593 | 1st AL West | Playoffs2-3 |
| 2002 | 103 | 59 | .636 | 1st AL West | Playoffs2-3 |
| 2001 | 102 | 60 | .630 | 2nd AL West | Playoffs2-3 |
| 2000 | 91 | 70 | .565 | 1st AL West | Playoffs2-3 |
| 1999 | 87 | 75 | .537 | 2nd AL West | — |
| 1998 | 74 | 88 | .457 | 4th AL West | — |
| 1997 | 65 | 97 | .401 | 4th AL West | — |
| 1996 | 78 | 84 | .481 | 3rd AL West | — |
| 1995 | 67 | 77 | .465 | 4th AL West | — |
| 1994 | 51 | 63 | .447 | 2nd AL West | — |
| 1993 | 68 | 94 | .420 | 7th AL West | — |
| 1992 | 96 | 66 | .593 | 1st AL West | Playoffs2-4 |
| 1991 | 84 | 78 | .519 | 4th AL West | — |
| 1990 | 103 | 59 | .636 | 1st AL West | Lost final4-4 |
| 1989 | 99 | 63 | .611 | 1st AL West | Champions8-1 |
| 1988 | 104 | 58 | .642 | 1st AL West | Lost final5-4 |
| 1987 | 81 | 81 | .500 | 3rd AL West | — |
| 1986 | 76 | 86 | .469 | 4th AL West | — |
| 1985 | 77 | 85 | .475 | 5th AL West | — |
| 1984 | 77 | 85 | .475 | 4th AL West | — |
| 1983 | 74 | 88 | .457 | 4th AL West | — |
| 1982 | 68 | 94 | .420 | 5th AL West | — |
| 1981 | 64 | 45 | .587 | 1st AL West | Playoffs3-3 |
| 1980 | 83 | 79 | .512 | 2nd AL West | — |
| 1979 | 54 | 108 | .333 | 7th AL West | — |
| 1978 | 69 | 93 | .426 | 6th AL West | — |
| 1977 | 63 | 98 | .391 | 7th AL West | — |
| 1976 | 87 | 74 | .540 | 2nd AL West | — |
| 1975 | 98 | 64 | .605 | 1st AL West | Playoffs0-3 |
| 1974 | 90 | 72 | .556 | 1st AL West | Champions7-2 |
| 1973 | 94 | 68 | .580 | 1st AL West | Champions7-5 |
| 1972 | 93 | 62 | .600 | 1st AL West | Champions7-5 |
| 1971 | 101 | 60 | .627 | 1st AL West | Playoffs0-3 |
| 1970 | 89 | 73 | .549 | 2nd AL West | — |
| 1969 | 88 | 74 | .543 | 2nd AL West | — |
