| Boys Baseball Undefeated Teams | |||
| Year | Class | School | Wins |
|---|---|---|---|
| 2009 | 2A | Champaign Holy Cross | 25 |
| 2008 | 2A | Springfield St. Agnes | 19 |
| 2006 | 2A | Carthage | 21 |
| 2006 | 1A | Joliet St. Paul | 23 |
| 2001 | AA | Minooka | 23 |
| 1998 | AA | Bradley Central | 24 |
| 1994 | AA | Mt. Zion | 22 |
| 1990 | A | Media Southern | 12 |
| 1989 | Morton | 19 | |
| 1988 | Mattoon | 22 | |
| 1985 | East Peoria Central | 21 | |
| 1984 | East Peoria Central | 19 | |
| 1980 | Joliet Laraway | 13 | |
| 1978 | Hennepin | 15 | |
| 1975 | Shorewood Troy | 26 | |
| 1972 | Shorewood Troy | 15 | |
| 1969 | Perry | 14 | |
| 1966 | Grayville | 14 | |
| 1964 | Coal City | 15 | |
| 1958 | Litchfield | 11 | |
| 3A | None To Date | 0 | |
Class HistoryThe IESA sanctioned boys baseball in 1955. There was one class of boys baseball until 1990 when the activity was split into A and AA based upon enrollment. It was split again in 2006 into the current three classes of 1A, 2A and 3A. |