Birth Chart and Horoscope of Frederick keys players
- Alan Mills (baseball)
- Alex Cintrón
- Alex Katz (baseball)
- Alex Wells
- Andy Van Slyke
- Ariel Miranda
- Arthur Rhodes
- Austin Hays
- Ben McDonald
- Bob McCrory
- Brady Anderson
- Brandon Fahey
- Brett Cumberland
- Brian Falkenborg
- Brian Roberts (baseball)
- Cadyn Grenier
- Caleb Joseph
- Chance Sisco
- Chris Britton (baseball)
- Chris Fussell
- Chris Ray
- Chris Tillman
- Christian Walker (baseball)
- Clayton Byrne
- Craig House (baseball)
- DJ Stewart
- Damon Buford
- Darren O'Day
- David Lough
- David Segui
- Dean Kremer
- Delino DeShields
- Doug Robbins (baseball)
- Dylan Bundy
- Eddie Gamboa
- Eduardo Rodríguez (left-handed pitcher)
- Eli Whiteside
- Garrett Cleavinger
- Howie Clark
- Ivanon Coffie
- Jaret Wright
- Jason Gurka
- Jason Hammel
- Jayson Werth
- Jeff Fiorentino
- Jeff Huson
- Jeff Manto
- Jesse Garcia (baseball)
- Jim Dedrick
- Jim Hoey
- Jim Johnson (baseball, born 1983)
- Jimmy Haynes
- Jimmy Key
- Joey Dawley
- John Maine
- John Means (baseball)
- John Parrish (baseball)
- Jonah Heim
- Jumbo Díaz
- Karl Triana
- Keegan Akin
- Keith Reed
- Kimera Bartee
- Kurt Birkins
- Kyle Hudson
- L. J. Hoes
- Larry Bigbie
- Matt Bischoff
- Matt Wieters
- Mike Bell (baseball coach)
- Mike Fontenot
- Mike Oquist
- Mike Wright (baseball)
- Mychal Givens
- Nerio Rodríguez
- Nick Markakis
- Nicky Delmonico
- Oliver Drake (baseball)
- Parker Bridwell
- Pedro Beato
- Radhames Dykhoff
- Ramón Hernández
- Randy Ruiz
- Rich Hill (pitcher)
- Ricky Gutierrez
- Robbie Widlansky
- Rommie Lewis
- Ryan Flaherty
- Ryan McKenna (baseball)
- Ryan Meisinger
- Ryan Minor
- Ryan Mountcastle
- Scott Copeland
- Scott Emerson (baseball)
- Scott Erickson
- Scott Rice
- Sean Maloney (baseball)
- Steve Bechler
- Steve Trachsel
- Steven Brault
- Stevie Wilkerson
- Tanner Scott
- Tim Byrdak
- Ty Kelly
- Tyler Wilson (baseball)
- Val Majewski
- Xavier Avery
- Yermín Mercedes
- Zac Lowther
- Zach Davies