Who Are We?
The Upper Darby Blue Sox are a summer baseball team based in Delaware County, Pennsylvania, competing in the Delco Semi-Pro League. The Delco League has a rich history, dating back to the early 20th century. The Blue Sox have a strong reputation for developing talented players and competing at a high level. David Jerdon has been the Manager of The UD Blue Sox Baseball since 1994.
In 1994, Harriett Jerdon realized there were no adult leagues in Upper Darby for players to continue playing after college. With her determination and passion for the game, the Upper Darby Blue Sox became a franchise. She continued to manage the team until her passing in 2008.
Over the 31 years that the Blue Sox have been in the Delco League, they have appeared in the playoffs 25 times and have competed in 5 Championship Series, winning the Charlie Kress Trophy in 2 of those appearances, in 2021 and 2024.
RECORD
- Delco League Championships: 2 (2021,2024)
- Playoff Appearances: 25+ (including several semifinal and final appearances)
- Notable Alumni: Several players have gone on to compete at the collegiate and professional levels, including MLB players, collegiate All-Americans, and national team members.
Who Are We?
The Upper Darby Blue Sox are a summer baseball team based in Delaware County, Pennsylvania, competing in the Delco Semi-Pro League. The Delco League has a rich history, dating back to the early 20th century. The Blue Sox have a strong reputation for developing talented players and competing at a high level. David Jerdon has been the Manager of The UD Blue Sox Baseball since 1994.
In 1994, Harriett Jerdon realized there were no adult leagues in Upper Darby for players to continue playing after college. With her determination and passion for the game, the Upper Darby Blue Sox became a franchise. She continued to manage the team until her passing in 2008.
Over the 31 years that the Blue Sox have been in the Delco League, they have appeared in the playoffs 25 times and have competed in 5 Championship Series, winning the Charlie Kress Trophy in 2 of those appearances, in 2021 and 2024.
RECORD
- Delco League Championships: 2 (2021,2024)
- Playoff Appearances: 25+ (including several semifinal and final appearances)
- Notable Alumni: Countless players have gone on to compete at the collegiate and professional levels, including MLB players, collegiate All-Americans, and national team members.
DAVE JERDON
Manager, 32nd Year in 2025
MARTY BURMAN
Assistant Coach, 5th Season
IZZY MENNA
Assistant Coach, 5th Season
Championships
CHAMPIONSHIP
Wright goes the distance to deliver Upper Darby’s second title
ASTON, PA — It took Upper Darby nearly 30 years to win their first Delco League title. Now, they have made four straight finals appearances and just brought home their second title in franchise history.
CHAMPIONSHIP
Delco League Finals GM4: Upper Darby 4, Aston Vallet 1
ASTON, PA — In last year’s Delco League Championship Series, Sam Wright earned a win in Game 4 to keep Upper Darby alive in a series that the Blue Sox would ultimately drop to Wayne in five games.
TOURNAMENT
Delco team competes in annual York Labor Day weekend tournament
YORK, PA — While a bizarre tiebreaker may have kept the Delco tournament team from advancing to the knockout stage in the annual Tom Kerrigan Memorial Tournament in York, they still put on a great showing and won a dramatic third game to give themselves a chance.
Championships
Tournaments
OUR BEST BASEBALL HIGHLIGTHS
- Cardinal Ohara Baseball Field
Home of the UD Blue Sox
Be in Touch With US
- (610) 715-1923
- [email protected]
- Pennsylvenia