Major Boys Championships
| Year | Regular Season | Playoffs |
| 2025 | Athletics | Cardinals |
| 2024 | Mariners | |
| 2023 | Athletics | |
| 2022 | Athletics | |
| 2021 | Mariners | |
| 2020 | Athletics | |
| 2019 | Athletics | Mariners |
| 2018 | Athletics | |
| 2017 | Mariners | Orioles |
| 2016 | Giants | Braves |
| 2015 | Braves | Pirates |
| 2014 | Giants | |
| 2013 | Cardinals | |
| 2012 | Pirates | Mariners |
| 2011 | Athletics | Cardinals |
| 2010 | Giants | |
| 2009 | Cardinals | Giants |
| 2008 | Cardinals | Giants |
| 2007 | Pirates | Cardinals |
| 2006 | Giants | Pirates |
| 2005 | Pirates | |
| 2004 | Giants | Pirates |
| 2003 | Athletics | Braves |
| 2002 | Braves | Pirates |
| 2001 | Pirates | |
| 2000 | Tigers | |