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Granite State Baseball League
GSBL18 (2001-2021)
GSBL18 League Champions
* Joined GSBL in 2013
** GSBL18 and GSBL28 Divisions Combined for Covid Season
| Year | Champions | Runner-Up |
| 2021 | Manch-Vegas Phillies | Merrimack Valley Redbirds |
| 2020** |
Nashua Rockies |
Manch-Vegas Phillies |
| 2019 | Manch-Vegas Phillies | Raphael Club Black Sox |
| 2018 | Manch-Vegas Phillies | Manchester Red Sox |
| 2017 | Raphael Club Black Sox | Nashua Eagles |
| 2016 | Nashua Eagles | Lawrence Pirates |
| 2015 | Lawrence Pirates | Seacoast Braves |
| 2014 | Manchester Little Monsters | Nashua Eagles |
| 2013* | Raphael Club Black Sox | Manchester Hurricanes |
| 2012 | Raphael Club Black Sox | Manchester Little Monsters |
| 2011 | Raphael Club Black Sox | Nashua Swindlers |
| 2010 | Frank Sign's Giants | Raphael Club Black Sox |
| 2009 | Manchester Angry Dragons | Frank Sign's Giants |
| 2008 | Frank Sign's Giants | Raphael Club Black Sox |
| 2007 | Raphael Club Black Sox | Frank Sign's Giants |
| 2006 | Manchester Crackas | Raphael Club Black Sox |
| 2005 | Manchester Crackas | Raphael Club Black Sox |
| 2004 | Manchester Crackas | Raphael Club Black Sox |
| 2003 | Manchester Crackas | N/A |
| 2002 | Manchester Mets | N/A |
| 2001 | Manchester Rockies | N/A |
