The Blue Rocks won the 2019 Mills Cup Championship for the first time since 1999, closing a five-game series with the Fayetteville Woodpeckers with a 2-0 victory on September 14, 2019. In December 2020, the Blue Rocks were officially invited to become an affiliate of the Washington Nationals, joining the Nationals' minor league system beginning with the 2021 season. In further conjunction with Major League Baseball's restructuring of Minor League Baseball in 2021, the Blue Rocks were organized into the High-A East. In 2022, the High-A East became known as the South Atlantic League, the name historically used by the regional circuit prior to the 2021 reorganization. Roster Playoffs Players of note More than 130 Blue Rocks have gone on to the major leagues, including All-Stars Carlos Beltrán, Lance Carter, Johnny Damon, Zack Greinke, Jon Lieber, Jed Lowrie, José Rosado, and Mike Sweeney. Other former Blue Rock players of note include: Jeremy Affeldt Ángel Berroa Brandon Berger Ryan Bukvich Tim Byrdak Dee Brown Clay Buchholz Kiko Calero David DeJesus Danny Duffy Chad Durbin Mark Ellis Jacoby Ellsbury Sal Fasano Carlos Febles Mike Fyhrie Byron Gettis Jason Gilfillan Jimmy Gobble Alexis Gómez Raúl González Rubén Gotay Shane Halter Ken Harvey Runelvys Hernández Norris Hopper Eric Hosmer Kila Ka'aihue Mendy López Ramon E. Martinez Mike MacDougal Sean Manaea Mike Moustakas Wes Obermueller Kit Pellow Paul Phillips Mark Quinn Rudy Rufer Glendon Rusch Brian Sanches Aníbal Sánchez José Santiago Shawn Sedlacek Andy Stewart Larry Sutton Matt Treanor Michael Tucker Retired numbers 18 Johnny Damon 33 Mike Sweeney 36 Robin Roberts, played for the earlier Blue Rocks team 42 Jackie Robinson (retired throughout baseball) Mascots The Blue Rocks have three mascots. Rocky Bluewinkle is a blue moose. Mr. Celery is a stalk of celery who comes out and dances to "Song 2" by Blur whenever Wilmington scores a run. Rubble is a giant blue rock. See also Delaware Sports Museum and Hall of Fame Wilmington Quicksteps Wilmington Park List of professional sports teams in Delaware References External links Baseball teams established in 1993 1993 establishments in Delaware Sports in Wilmington, Delaware Professional baseball teams in Delaware Wilmington Riverfront Washington Nationals minor league affiliates Kansas City Royals minor league affiliates Boston Red Sox minor league affiliates Carolina League teams Sports in the Delaware Valley High-A East teams South Atlantic League teams