| 2025 | Tony Beasley (3B coach) |
| 2024 | Tony Beasley (3B coach) |
| 2023 | Tony Beasley (3B coach) |
| 2022 | Tony Beasley (3B coach, interim manager Aug 15 onward) |
| 2021 | Tony Beasley (3B coach) |
| 2020 | Tony Beasley (3B coach, st only) |
| 2019 | Shawn Kelley |
| 2018 | Tony Beasley (3B coach) |
| 2017 | Tony Beasley (3B coach) |
| 2016 | Tony Beasley (3B coach) |
| 2015 | Tony Beasley (3B coach) |
| 2014 | Tim Bogar (Bench coach until Sep 3, interim manager Sep 4 onward) |
| 2013 | Lance Berkman (until Sep 17) |
| 2012 | Leonys Martin (st, Jun 15 onward) |
| 2011 | Thad Bosley (hitting coach, until Jun 7), Leonys Martin (Sep 2 onward) |
| 2010 | Vladimir Guerrero |
| 2009 | Frank Catalanotto (st) |
| 2008 | Frank Catalanotto |
| 2007 | Frank Catalanotto |
| 2006 | Rod Barajas |
| 2005 | Rod Barajas |
| 2004 | Rod Barajas |
| 2003 | Todd Greene (st), Marcus Thames (Jul 17 onward) |
| 2002 | Frank Catalanotto (until Aug 16) |
| 2001 | Frank Catalanotto |
| 2000 | Frank Catalanotto |
| 1999 | Todd Zeile |
| 1998 | Matt Whiteside (st), Todd Zeile (Aug 1 onward) |
| 1997 | Matt Whiteside (st, May 13 onward) |
| 1996 | Matt Whiteside |
| 1995 | Matt Whiteside |
| 1994 | Matt Whiteside (until Aug 8) |
| 1993 | Matt Whiteside |
| 1992 | John Barfield (st) |
| 1991 | John Barfield (until Aug 1) |
| 1990 | John Barfield (st, Jun 8 onward) |
| 1989 | John Barfield (st, Sep 7 onward) |
| 1988 | Jim Steels (st, May 4 – Aug 13) |
| 1987 | Greg Harris |
| 1986 | Greg Harris |
| 1985 | Greg Tabor (st), Greg Harris (Apr 14 onward) |
| 1984 | Chucky Canady (st) |
| 1983 | Lamar Johnson (st) |
| 1982 | Lamar Johnson |
| 1981 | Jim Farr (st), Bobby Jones (Sep 1 onward) |
| 1980 | Jerry Don Gleaton (st, Sep 6 onward) |
| 1979 | Dave Rajsich (st), Jerry Don Gleaton (Jul 11 – Aug 15) |
| 1978 | Doc Medich (st) |
| 1977 | Mike Wallace (May 1 only), John Poloni (Sep 16 & Oct 2) |
| 1976 | Tommy Moore (st) |
| 1975 | Roy Howell (until Jul 6), Tommy Moore (Jul 8 – Jul ?) |
| 1974 | Steve Dunning (Apr 28 only), Don Stanhouse (May 26 – Sep 2), Roy Howell (Sep 9 onward) |
| 1973 | Dick Bosman (until May 9) |
| 1972 | Dick Bosman |
Washington Senators Years |
|
| 1971 | Dick Bosman |
| 1970 | Dick Bosman |
| 1969 | Dick Bosman |
| 1968 | Dick Bosman |
| 1967 | Dick Bosman (st, Aug 29 onward) |
| 1966 | Ron Kline |
| 1965 | Ron Kline |
| 1964 | Ron Kline |
| 1963 | Joe McClain (st), Ron Kline (Apr 8 onward) |
| 1962 | Joe McClain (until Jun 1), Carl Bouldin (Jun 19 – Sep 21) |
| 1961 | Joe McClain |
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