St. Joseph Boys Championship History
| Team (Record) | State Championship | Result |
| St. Joseph 2012 (26-1) | Defeated Hillhouse (Class LL) | W 62-54 |
| St. Joseph 2011(24-2) | Defeated Fairfield Prep (Class LL) | W 79-53 |
| St. Joseph 2001 (24-3) | Defeated Holy Cross (Class L) | W 66-48 |
| St. Joseph 1996 (21-7) | Defeated Torrington (Class L) | W 67-47 |
| St. Joseph 1993 (20-4) | Defeated Bullard Havens (Class L) | W 76-57 |
| St. Joseph 1992 (24-1) | Defeated East Catholic (Class L) | W 85-67 |
| St. Joseph 1988 | Defeated Harding (Class L) | W 69-66 |
| St. Joseph 1987 | Defeated Kolbe Cathedral (Class M) | W 72-64 |
| St. Joseph 1986 | Defeated Weston (Class M) | W 51-50 OT |
| St. Joseph 1977 | Defeated St. Thomas Aquinas (Class S) | W 89-63 |
| St. Joseph 1975 | Defeated St. Thomas Aquinas (Class S) | W 64-63 |
| Team (Record) | FCIAC Championship | Result |
| St. Joseph 2000 (22-3) | Defeated Harding | W 73-70 2OT |
| Team (Record) | ACC Championship | Result |
| St. Joseph 1988 | Defeated Harding | Win |
| St. Joseph 1987 | Defeated Kolbe Cathedral | Win |
| St. Joseph 1986 | Defeated Kolbe Cathedral | Win |