K
- Austin Kearns
- Joe Keener
- Kenny Kelly
- Roberto Kelly
- Adam Kennedy
- Logan Kensing
- Joe Kerrigan
- Sun-Woo Kim
- Cole Kimball
- Ray King
- Clay Kirby
- Steve Kline
- Randy Knorr
- Eric Knott
- Darold Knowles
- Wayne Krenchicki
- Bill Krueger
Read more about this topic: Washington Nationals All-time Roster