| SCHOOL YEAR | BASEBALL CONFERENCE CHAMPION |
| 1954-55 | Vandercook Lake |
| 1955-56 | Western |
| 1956-57 | Western |
| 1957-58 | Vandercook Lake |
| 1958-59 | Michigan Center |
| 1959-60 | Vandercook Lake |
| 1960-61 | Michigan Center |
| 1961-62 | Concord |
| 1962-63 | Michigan Center |
| 1963-64 | Michigan Center |
| 1964-65 | East Jackson, Western |
| 1965-66 | Michigan Center |
| 1966-67 | Michigan Center |
| 1967-68 | Michigan Center |
| 1968-69 | Michigan Center |
| 1969-70 | Michigan Center |
| 1970-71 | Columbia Central |
| 1971-72 | Northwest |
| 1972-73 | Michigan Center |
| 1973-74 | Western |
| 1974-75 | Northwest |
| 1975-76 | Napoleon |
| 1976-77 | Grass Lake |
| 1977-78 | Grass Lake |
| 1978-79 | East Jackson |
| 1979-80 | Grass Lake |
| 1980-81 | Grass Lake |
| 1981-82 | East Jackson |
| 1982-83 | Michigan Center |
| 1983-84 | Manchester |
| 1984-85 | Napoleon |
| 1985-86 | Michigan Center |
| 1986-87 | Unknown |
| 1987-88 | Michigan Center |
| 1988-89 | Michigan Center |
| 1989-90 | Hanover Horton |
| 1990-91 | Manchester, Grass Lake |
| 1991-92 | Grass Lake |
| 1992-93 | Grass Lake |
| 1993-94 | Napoleon |
| 1994-95 | Vandercook Lake |
| 1995-96 | Addison |
| 1996-97 | Napoleon |
| 1997-98 | Vandercook Lake |
| 1998-99 | Napoleon |
| 1999-00 | Napoleon |
| 2000-01 | Napoleon |
| 2001-02 | Vandercook Lake |
| 2002-03 | Manchester |
| 2003-04 | Michigan Center |
| 2004-05 | Michigan Center |
| 2005-06 | Michigan Center |
| 2006-07 | Michigan Center |
| 2007-08 | Grass Lake |
| 2008-09 | Michigan Center |
| 2009-10 | East Jackson, Michigan Center |
| 2010-11 | East Jackson |
| 2011-12 | Hanover Horton |
| 2012-13 | Manchester, Michigan Center |
| 2013-14 | Michigan Center |
| 2014-15 | Michigan Center |
| 2015-16 | Hanover Horton |
| 2016-17 | Napoleon |
| 2017-18 | Napoleon |
| 2018-19 | Michigan Center, Napoleon |
| 2019-20 | Season canceled |
Baseball league championships (1954-2020)
Addison (1): 1996
Columbia Central (1): 1971
Concord (1): 1962
East Jackson (5): 1965t, 1979, 1982, 2010t, 2011
Hanover-Horton (3): 1990, 2012, 2016
Manchester (4): 1984, 1991t, 2003, 2013t
Michigan Center (24): 1959, 1961, 1963, 1964, 1966, 1967, 1968, 1969, 1970, 1973, 1983, 1986, 1988, 1989, 2004, 2005, 2006, 2007, 2009, 2010t, 2013t, 2014, 2015, 2019t
Napoleon (10): 1976, 1985, 1994, 1997, 1999, 2000, 2001, 2017, 2018, 2019t
Northwest (2): 1972, 1975
Grass Lake (8): 1977, 1978, 1980, 1981, 1991t, 1992, 1993, 2008
Vandercook Lake (6): 1955, 1958, 1960, 1995, 1998, 2002
Western (4): 1956, 1957, 1965t, 1974
