S
- Ángel Salazar
- Bill Sampen
- Scott Sanderson
- Julio Santana
- F. P. Santangelo
- Nelson Santovenia
- Rich Sauveur
- Bob Scanlan
- Pat Scanlon
- Dan Schatzeder
- Fred Scherman
- Curt Schmidt
- Dave Schmidt
- Brian Schneider
- Chris Schroder
- Rick Schu
- Mickey Scott
- Rodney Scott
- Tim Scott
- Tony Scott
- Bob Sebra
- Zack Segovia
- David Segui
- Fernando Seguignol
- Carroll Sembera
- Scott Service
- Atahualpa Severino
- Don Shaw *
- Jeff Shaw
- Steve Shea
- Steven Shell
- Razor Shines
- Rick Short
- Joe Siddall
- Dave Silvestri
- Doug Simons
- Jason Simontacchi
- Ken Singleton
- Matt Skrmetta
- Doug Slaten
- Terrmel Sledge
- J. D. Smart
- Bryn Smith
- Chris Smith
- Dan Smith
- Lee Smith
- Mark Smith
- Mike Smith
- Zane Smith
- Chris Snelling
- Tony Solaita
- Jhonatan Solano
- Lary Sorensen
- Alfonso Soriano
- Rafael Soriano
- Elías Sosa
- Jorge Sosa
- Denard Span
- Joe Sparma
- Tim Spehr
- Chris Speier
- Levale Speigner
- Sean Spencer
- Junior Spivey
- Randy St. Claire
- Marv Staehle
- Matt Stairs
- Craig Stammen
- Don Stanhouse
- Andy Stankiewicz
- Mike Stanton
- Rusty Staub
- John Stefero
- Mike Stenhouse
- Lee Stevens
- Scott Stewart
- Bob Stinson
- Bill Stoneman
- Drew Storen
- Da Rond Stovall
- Chris Stowers
- Doug Strange
- Stephen Strasburg
- Scott Strickland
- John Strohmayer
- Everett Stull
- Gary Sutherland
- Kurt Suzuki
- Stan Swanson
- Ron Swoboda
Read more about this topic: Washington Nationals All-time Roster