| 2024 | Andrew Knizner (until Jul 27) |
| 20232 | Sandy Leon (until Jun 13) |
| 2022 | Matt Carpenter (st) |
| 2021 | Rougned Odor (st) |
| 2020 | Rougned Odor |
| 2019 | Rougned Odor |
| 2018 | Rougned Odor |
| 2017 | Rougned Odor |
| 2016 | Rougned Odor |
| 2015 | Rougned Odor |
| 2014 | Josh Wilson (util May 8), Rougned Odor (Jul 18 onward) |
| 2013 | A.J. Pierzynski |
| 2012 | Scott Coolbaugh (Hitting Coach) |
| 2011 | Brian Barden (st), Omar Quintanilla (Jul 22 – Aug 25) |
| 2010 | Justin Smoak (until Jul 8), Cristian Guzman (Jul 31 – Aug 22), Alex Cora (Aug 24 to Sep 5) |
| 2009 | Justin Smoak (st) |
| 2008 | Ramon Vazquez |
| 2007 | Ramon Vazquez |
| 2006 | Matt Stairs (Jul 31 to Sep 14) |
| 2005 | Alfonso Soriano |
| 2004 | Alfonso Soriano (until Sep 16) |
| 2003 | Chad Kreuter (until Apr 27), Ryan Ludwick (Jul 2 – Jul 17) |
| 2002 | Hank Blalock |
| 2001 | Ricky Ledee (st, Jun 13 onward) |
| 2000 | Ed Napoleon (1b coach, until May 9 – retired), Ricky Ledee (Jul 30 onward) |
| 1999 | Ed Napoleon (1b coach) |
| 1998 | Ed Napoleon (1b coach) |
| 1997 | Ed Napoleon (1b coach) |
| 1996 | Ed Napoleon (1b coach) |
| 1995 | Ed Napoleon (1b coach) |
| 1994 | Rob Ducey |
| 1993 | Geno Petralli (st, May 16 onward), Rob Ducey |
| 1992 | Geno Petralli |
| 1991 | Geno Petralli |
| 1990 | Geno Petralli |
| 1989 | Geno Petralli |
| 1988 | Geno Petralli |
| 1987 | Geno Petralli |
| 1986 | Geno Petralli |
| 1985 | Donnie Scott (st), Geno Petralli (Jul 9 onward) |
| 1984 | Dave Hostetler |
| 1983 | Dave Hostetler |
| 1982 | Len Whitehouse (st), Dave Hostetler (May 29 onward) |
| 1981 | Odie Davis (st), Len Whitehouse (Sep 1 only) |
| 1980 | Odie Davis (st, Sep 3 onward) |
| 1979 | Oscar Gamble (st), Dave Chalk (May 9 – Jun 13), Eric Soderholm (Jun 18 onward) |
| 1978 | Juan Beniquez |
| 1977 | Juan Beniquez |
| 1976 | Juan Beniquez |
| 1975 | Cesar Tovar |
| 1974 | Bill Fahey |
| 1973 | Bill Fahey (st) |
| 1972 | Ken Suarez (until Jul 22), Bill Fahey (Jul 27 onward) |
Washington Senators Years |
|
| 1971 | Dick Billings (st) |
| 1970 | Tom Grieve (st), Wayne Comer (May 12 onward) |
| 1969 | Mike Epstein (st), Doug Camilli (Sep 14 only) |
| 1968 | Mike Epstein |
| 1967 | John Orsino (st), Mike Epstein (Jun 5 onward) |
| 1966 | John Orsino (until Jul 24) |
| 1965 | Woodie Held |
| 1964 | Don Blasingame (st), Ken Hunt (until Jul 29), Roy Sievers (Aug 1 onward) |
| 1963 | Bob Schmidt (st), Tom Brown (Apr 8 – Jun 28), Don Blasingame (Jul 6 onward) |
| 1962 | Bob Schmidt |
| 1961 | Gene Green |
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