Portland Sea Dogs
- Location: Portland, ME
- League: Eastern League 1994-2019; Double-A Northeast 2021; Eastern League 2022-
- Affiliation: Florida Marlins 1994-2002; Boston Red Sox 2003-present
- Ballpark: Hadlock Field
- Famous Alumni: Josh Beckett, Luis Castillo, Livan Hernandez, Charles Johnson, Kevin Millar, Jonathan Papelbon, Brad Penny, Edgar Renteria
The Portland Sea Dogs, of the Class Double-A Eastern League and briefly in Double-A Northeast, were the first minor league team in the Portland, ME, area since the Maine Guides left after the 1988 season. The Boston Red Sox farmhands play their home games at Hadlock Field in Portland.
The Sea Dogs franchise arrived in 1994, originally playing as part of the Florida Marlins farm system in a brand-new downtown stadium. Beginning with the two-year affiliation cycle that started in 2003, they succeeded the Trenton Thunder in the local-favorite Boston Red Sox's system - which makes plenty more sense.
The Sea Dogs have advanced to the Eastern League playoffs eight times in their history, capturing their only circuit title in 2006.
In late 2022, Sea Dogs' ownership signed an agreement to sell the club to Diamond Baseball Holdings, the entity created by entertainment giant Endeavor Group Holdings but later sold to Silver Lake Partners. When the sale closed in early 2023, DBH reached a milestone: owning 10 percent of MLB's 120 farm teams. The group's initial nine-team purchase took it from nowhere on the list of minors operators to the one with the most teams - by more than double.
The Dogs play Copa de la Diversión Hispanic engagement campaign games as Alces de Maine (Maine Moose).
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